diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..9ccc549
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,7 @@
+node_modules
+test
+.git
+.github
+k8s
+docker-compose.yml
+Dockerfile
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..05a7337
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,11 @@
+version: 2
+updates:
+  - package-ecosystem: "npm"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c8d6abc..f651c6f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -7,18 +7,40 @@ env:
   IMAGE_NAME: ${{ github.repository }}
 
 jobs:
+  test:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v7
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v6
+        with:
+          node-version: 22
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run tests
+        run: npm test
+
   build_and_push:
     runs-on: ubuntu-latest
+    needs: test
     permissions:
       contents: read
       packages: write
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Log in to the Container registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
@@ -26,7 +48,7 @@ jobs:
 
       - name: Extract metadata (tags, labels) for Docker
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
           tags: |
@@ -37,7 +59,7 @@ jobs:
             type=sha,format=long
 
       - name: Build and push Docker image
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           context: .
           push: true
diff --git a/Dockerfile b/Dockerfile
index a7b4c6e..3c895c3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM node:lts-alpine
 WORKDIR /usr/src/app
 COPY package*.json ./
-RUN npm install
+RUN npm ci --omit=dev
 COPY . .
 EXPOSE 9000
 CMD [ "node" , "server.js"]
diff --git a/package-lock.json b/package-lock.json
index 64d2c10..7b93838 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,7 +10,36 @@
       "license": "ISC",
       "dependencies": {
         "express": "^5.2.1",
-        "morgan": "^1.10.1"
+        "morgan": "^1.11.0"
+      },
+      "devDependencies": {
+        "supertest": "^7.2.2"
+      },
+      "engines": {
+        "node": ">=20"
+      }
+    },
+    "node_modules/@noble/hashes": {
+      "version": "1.8.0",
+      "resolved": "https://registry.npmjs.org/@noble/hashes/-/hashes-1.8.0.tgz",
+      "integrity": "sha512-jCs9ldd7NwzpgXDIf6P3+NrHh9/sD6CQdxHyjQI+h/6rDNo88ypBxxz45UDuZHz9r3tNz7N/VInSVoVdtXEI4A==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": "^14.21.3 || >=16"
+      },
+      "funding": {
+        "url": "https://paulmillr.com/funding/"
+      }
+    },
+    "node_modules/@paralleldrive/cuid2": {
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/@paralleldrive/cuid2/-/cuid2-2.3.1.tgz",
+      "integrity": "sha512-XO7cAxhnTZl0Yggq6jOgjiOHhbgcO4NqFqwSmQpjK3b6TEE6Uj/jfSk6wzYyemh3+I0sHirKSetjQwn5cZktFw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@noble/hashes": "^1.1.5"
       }
     },
     "node_modules/accepts": {
@@ -26,6 +55,20 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/asap": {
+      "version": "2.0.6",
+      "resolved": "https://registry.npmjs.org/asap/-/asap-2.0.6.tgz",
+      "integrity": "sha512-BSHWgDSAiKs50o2Re8ppvp3seVHXSRM44cdSsT9FfNEUUZLOGWVCsiWaRPWM1Znn+mqZ1OfVZ3z3DWEzSp7hRA==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/asynckit": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
+      "integrity": "sha512-Oei9OH4tRh0YqU3GxhX79dM/mwVgvbZJaSNaRk+bshkj0S5cfHcgYakreBjrHwatXKbz+IoIdYLxrKim2MjW0Q==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/basic-auth": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/basic-auth/-/basic-auth-2.0.1.tgz",
@@ -100,6 +143,29 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/combined-stream": {
+      "version": "1.0.8",
+      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
+      "integrity": "sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "delayed-stream": "~1.0.0"
+      },
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
+    "node_modules/component-emitter": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.3.1.tgz",
+      "integrity": "sha512-T0+barUSQRTUQASh8bx02dl+DhF54GtIDY13Y3m9oWTklKbb3Wv974meRpeZ3lp1JpLVECWWNHC4vaG2XHXouQ==",
+      "dev": true,
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/content-disposition": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-1.0.1.tgz",
@@ -140,6 +206,13 @@
         "node": ">=6.6.0"
       }
     },
+    "node_modules/cookiejar": {
+      "version": "2.1.4",
+      "resolved": "https://registry.npmjs.org/cookiejar/-/cookiejar-2.1.4.tgz",
+      "integrity": "sha512-LDx6oHrK+PhzLKJU9j5S7/Y3jM/mUHvD/DeI1WQmJn652iPC5Y4TBzC9l+5OMOXlyTTA+SmVUPm0HQUwpD5Jqw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/debug": {
       "version": "4.4.3",
       "resolved": "https://registry.npmjs.org/debug/-/debug-4.4.3.tgz",
@@ -157,6 +230,16 @@
         }
       }
     },
+    "node_modules/delayed-stream": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
+      "integrity": "sha512-ZySD7Nf91aLB0RxL4KGrKHBXl7Eds1DAmEdcoVawXnLD7SDhpNgtuII2aAkg7a7QS41jxPSZ17p4VdGnMHk3MQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.4.0"
+      }
+    },
     "node_modules/depd": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/depd/-/depd-2.0.0.tgz",
@@ -166,6 +249,17 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/dezalgo": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/dezalgo/-/dezalgo-1.0.4.tgz",
+      "integrity": "sha512-rXSP0bf+5n0Qonsb+SVVfNfIsimO4HEtmnIpPHY8Q1UCzKlQrDMfdobr8nJOOsRgWCyMRqeSBQzmWUMq7zvVig==",
+      "dev": true,
+      "license": "ISC",
+      "dependencies": {
+        "asap": "^2.0.0",
+        "wrappy": "1"
+      }
+    },
     "node_modules/dunder-proto": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/dunder-proto/-/dunder-proto-1.0.1.tgz",
@@ -225,6 +319,22 @@
         "node": ">= 0.4"
       }
     },
+    "node_modules/es-set-tostringtag": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/es-set-tostringtag/-/es-set-tostringtag-2.1.0.tgz",
+      "integrity": "sha512-j6vWzfrGVfyXxge+O0x5sh6cvxAog0a/4Rdd2K36zCMV5eJ+/+tOAngRO8cODMNWbVRdVlmGZQL2YS3yR8bIUA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "es-errors": "^1.3.0",
+        "get-intrinsic": "^1.2.6",
+        "has-tostringtag": "^1.0.2",
+        "hasown": "^2.0.2"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      }
+    },
     "node_modules/escape-html": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/escape-html/-/escape-html-1.0.3.tgz",
@@ -283,6 +393,13 @@
         "url": "https://opencollective.com/express"
       }
     },
+    "node_modules/fast-safe-stringify": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/fast-safe-stringify/-/fast-safe-stringify-2.1.1.tgz",
+      "integrity": "sha512-W+KJc2dmILlPplD/H4K9l9LcAHAfPtP6BY84uVLXQ6Evcz9Lcg33Y2z1IVblT6xdY54PXYVHEv+0Wpq8Io6zkA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/finalhandler": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-2.1.1.tgz",
@@ -304,6 +421,64 @@
         "url": "https://opencollective.com/express"
       }
     },
+    "node_modules/form-data": {
+      "version": "4.0.6",
+      "resolved": "https://registry.npmjs.org/form-data/-/form-data-4.0.6.tgz",
+      "integrity": "sha512-vKatAh4SlVfgbv+YtmhiRjhEMJsYpsG1Y2rMQtR+SVSbytsSD1YGzDIcrAJmdFec88u/+VoGmxnl+80gL1tRCQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "asynckit": "^0.4.0",
+        "combined-stream": "^1.0.8",
+        "es-set-tostringtag": "^2.1.0",
+        "hasown": "^2.0.4",
+        "mime-types": "^2.1.35"
+      },
+      "engines": {
+        "node": ">= 6"
+      }
+    },
+    "node_modules/form-data/node_modules/mime-db": {
+      "version": "1.52.0",
+      "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.52.0.tgz",
+      "integrity": "sha512-sPU4uV7dYlvtWJxwwxHD0PuihVNiE7TyAbQ5SWxDCB9mUYvOgroQOwYQQOKPJ8CIbE+1ETVlOoK1UC2nU3gYvg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/form-data/node_modules/mime-types": {
+      "version": "2.1.35",
+      "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.35.tgz",
+      "integrity": "sha512-ZDY+bPm5zTTF+YpCrAU9nK0UgICYPT0QtT1NZWFv4s++TNkcgVaT0g6+4R2uI4MjQjzysHB1zxuWL50hzaeXiw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "mime-db": "1.52.0"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/formidable": {
+      "version": "3.5.4",
+      "resolved": "https://registry.npmjs.org/formidable/-/formidable-3.5.4.tgz",
+      "integrity": "sha512-YikH+7CUTOtP44ZTnUhR7Ic2UASBPOqmaRkRKxRbywPTe5VxF7RRCck4af9wutiZ/QKM5nME9Bie2fFaPz5Gug==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@paralleldrive/cuid2": "^2.2.2",
+        "dezalgo": "^1.0.4",
+        "once": "^1.4.0"
+      },
+      "engines": {
+        "node": ">=14.0.0"
+      },
+      "funding": {
+        "url": "https://ko-fi.com/tunnckoCore/commissions"
+      }
+    },
     "node_modules/forwarded": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/forwarded/-/forwarded-0.2.0.tgz",
@@ -392,10 +567,26 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/has-tostringtag": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/has-tostringtag/-/has-tostringtag-1.0.2.tgz",
+      "integrity": "sha512-NqADB8VjPFLM2V0VvHUewwwsw0ZWBaIdgo+ieHtK3hasLz4qeCRjYcqfB6AQrBggRKppKF8L52/VqdVsO47Dlw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "has-symbols": "^1.0.3"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
     "node_modules/hasown": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/hasown/-/hasown-2.0.2.tgz",
-      "integrity": "sha512-0hJU9SCPvmMzIBdZFqNPXWa6dqh7WdH0cII9y+CyS8rG3nL48Bclra9HmKhVVUHyPWNH5Y7xDwAB7bfgSjkUMQ==",
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/hasown/-/hasown-2.0.4.tgz",
+      "integrity": "sha512-T2UbfbBEF32wiepXIsMlTW9+dDYC6wMh/t/vYA4tuOMKqWz/n3vr1NFSxQiyP+zk2mXsoMA/i/7qV6LKut1t1A==",
       "license": "MIT",
       "dependencies": {
         "function-bind": "^1.1.2"
@@ -491,6 +682,29 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/methods": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/methods/-/methods-1.1.2.tgz",
+      "integrity": "sha512-iclAHeNqNm68zFtnZ0e+1L2yUIdvzNoauKU4WBA3VvH/vPFieF7qfRlwUZU+DA9P9bPXIS90ulxoUoCH23sV2w==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/mime": {
+      "version": "2.6.0",
+      "resolved": "https://registry.npmjs.org/mime/-/mime-2.6.0.tgz",
+      "integrity": "sha512-USPkMeET31rOMiarsBNIHZKLGgvKc/LrjofAnBlOttf5ajRvqiRA8QsenbcooctK6d6Ts6aqZXBA+XbkKthiQg==",
+      "dev": true,
+      "license": "MIT",
+      "bin": {
+        "mime": "cli.js"
+      },
+      "engines": {
+        "node": ">=4.0.0"
+      }
+    },
     "node_modules/mime-db": {
       "version": "1.54.0",
       "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.54.0.tgz",
@@ -517,19 +731,23 @@
       }
     },
     "node_modules/morgan": {
-      "version": "1.10.1",
-      "resolved": "https://registry.npmjs.org/morgan/-/morgan-1.10.1.tgz",
-      "integrity": "sha512-223dMRJtI/l25dJKWpgij2cMtywuG/WiUKXdvwfbhGKBhy1puASqXwFzmWZ7+K73vUPoR7SS2Qz2cI/g9MKw0A==",
+      "version": "1.11.0",
+      "resolved": "https://registry.npmjs.org/morgan/-/morgan-1.11.0.tgz",
+      "integrity": "sha512-zSkVu3t18r39pw4ixfBKvfZi3y2UOqr7d4WYwcj3m8nXpEQK4rPO6GLzs/CExoRgmX3y9EjmmcXqv6jq0SK46g==",
       "license": "MIT",
       "dependencies": {
         "basic-auth": "~2.0.1",
         "debug": "2.6.9",
         "depd": "~2.0.0",
-        "on-finished": "~2.3.0",
+        "on-finished": "~2.4.1",
         "on-headers": "~1.1.0"
       },
       "engines": {
         "node": ">= 0.8.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/express"
       }
     },
     "node_modules/morgan/node_modules/debug": {
@@ -547,18 +765,6 @@
       "integrity": "sha512-Tpp60P6IUJDTuOq/5Z8cdskzJujfwqfOTkrwIwj7IRISpnkJnT6SyJ4PCPnGMoFjC9ddhal5KVIYtAt97ix05A==",
       "license": "MIT"
     },
-    "node_modules/morgan/node_modules/on-finished": {
-      "version": "2.3.0",
-      "resolved": "https://registry.npmjs.org/on-finished/-/on-finished-2.3.0.tgz",
-      "integrity": "sha512-ikqdkGAAyf/X/gPhXGvfgAytDZtDbr+bkNUJ0N9h5MI/dmdgCs3l6hoHrcUv41sRKew3jIwrp4qQDXiK99Utww==",
-      "license": "MIT",
-      "dependencies": {
-        "ee-first": "1.1.1"
-      },
-      "engines": {
-        "node": ">= 0.8"
-      }
-    },
     "node_modules/ms": {
       "version": "2.1.3",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
@@ -847,6 +1053,42 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/superagent": {
+      "version": "10.3.0",
+      "resolved": "https://registry.npmjs.org/superagent/-/superagent-10.3.0.tgz",
+      "integrity": "sha512-B+4Ik7ROgVKrQsXTV0Jwp2u+PXYLSlqtDAhYnkkD+zn3yg8s/zjA2MeGayPoY/KICrbitwneDHrjSotxKL+0XQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "component-emitter": "^1.3.1",
+        "cookiejar": "^2.1.4",
+        "debug": "^4.3.7",
+        "fast-safe-stringify": "^2.1.1",
+        "form-data": "^4.0.5",
+        "formidable": "^3.5.4",
+        "methods": "^1.1.2",
+        "mime": "2.6.0",
+        "qs": "^6.14.1"
+      },
+      "engines": {
+        "node": ">=14.18.0"
+      }
+    },
+    "node_modules/supertest": {
+      "version": "7.2.2",
+      "resolved": "https://registry.npmjs.org/supertest/-/supertest-7.2.2.tgz",
+      "integrity": "sha512-oK8WG9diS3DlhdUkcFn4tkNIiIbBx9lI2ClF8K+b2/m8Eyv47LSawxUzZQSNKUrVb2KsqeTDCcjAAVPYaSLVTA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "cookie-signature": "^1.2.2",
+        "methods": "^1.1.2",
+        "superagent": "^10.3.0"
+      },
+      "engines": {
+        "node": ">=14.18.0"
+      }
+    },
     "node_modules/toidentifier": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
diff --git a/package.json b/package.json
index 9357a16..8ba8908 100644
--- a/package.json
+++ b/package.json
@@ -1,11 +1,12 @@
 {
   "name": "helloworld",
   "version": "1.0.0",
-  "description": "simple helloworld example build on NodeJS & Kubernetes",
+  "description": "simple helloworld example build on NodeJS & Kubernetes",
   "main": "server.js",
   "scripts": {
     "start": "node server.js",
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "node --test",
+    "test:coverage": "node --test --experimental-test-coverage"
   },
   "repository": {
     "type": "git",
@@ -24,8 +25,14 @@
     "url": "https://github.com/trendev/helloworld/issues"
   },
   "homepage": "https://github.com/trendev/helloworld#readme",
+  "engines": {
+    "node": ">=20"
+  },
   "dependencies": {
     "express": "^5.2.1",
-    "morgan": "^1.10.1"
+    "morgan": "^1.11.0"
+  },
+  "devDependencies": {
+    "supertest": "^7.2.2"
   }
 }
diff --git a/server.js b/server.js
index 445e971..e64fea9 100644
--- a/server.js
+++ b/server.js
@@ -2,7 +2,7 @@
 
 const express = require('express');
 const morgan = require('morgan');
-var os = require("os");
+const os = require("os");
 
 const app = express();
 
@@ -43,5 +43,9 @@ app.get('/', (req, res) => res.send({
     timestamp: new Date().getTime()
 }));
 
-const port = process.env.PORT || 9000;
-app.listen(port, () => console.log(`NodeJS server listening on port ${port}`));
\ No newline at end of file
+if (require.main === module) {
+    const port = process.env.PORT || 9000;
+    app.listen(port, () => console.log(`NodeJS server listening on port ${port}`));
+}
+
+module.exports = { app, getNetworkInterfaces };
diff --git a/test/server.test.js b/test/server.test.js
new file mode 100644
index 0000000..6ba769a
--- /dev/null
+++ b/test/server.test.js
@@ -0,0 +1,132 @@
+'use strict';
+
+const { test, describe, beforeEach, afterEach } = require('node:test');
+const assert = require('node:assert');
+const request = require('supertest');
+const os = require('os');
+
+const { app, getNetworkInterfaces } = require('../server');
+
+describe('GET /health', () => {
+
+    test('responds with 200 and an ok status', async () => {
+        const res = await request(app).get('/health');
+        assert.strictEqual(res.status, 200);
+        assert.strictEqual(res.body.status, 'ok');
+        assert.strictEqual(res.body.message, 'we are up and running 😘');
+    });
+
+});
+
+describe('GET /', () => {
+
+    const POD_ENV_VARS = ['MY_POD_NAMESPACE', 'MY_POD_NAME', 'MY_POD_IP'];
+    const saved = {};
+
+    beforeEach(() => {
+        POD_ENV_VARS.forEach((name) => {
+            saved[name] = process.env[name];
+            delete process.env[name];
+        });
+    });
+
+    afterEach(() => {
+        POD_ENV_VARS.forEach((name) => {
+            if (saved[name] === undefined) {
+                delete process.env[name];
+            } else {
+                process.env[name] = saved[name];
+            }
+        });
+    });
+
+    test('responds with 200 and the expected body shape', async () => {
+        const before = Date.now();
+        const res = await request(app).get('/');
+        const after = Date.now();
+
+        assert.strictEqual(res.status, 200);
+        assert.strictEqual(res.body.status, 'ok');
+        assert.ok('namespace' in res.body);
+        assert.ok('hostname' in res.body);
+        assert.ok('ip' in res.body);
+        assert.ok(res.body.timestamp >= before && res.body.timestamp <= after);
+    });
+
+    test('falls back to os values when pod env vars are not set', async () => {
+        const res = await request(app).get('/');
+
+        assert.strictEqual(res.status, 200);
+        assert.strictEqual(res.body.namespace, 'docker');
+        assert.strictEqual(res.body.hostname, os.hostname());
+        assert.ok(Array.isArray(res.body.ip));
+    });
+
+    test('uses pod env vars when set', async () => {
+        process.env.MY_POD_NAMESPACE = 'production';
+        process.env.MY_POD_NAME = 'helloworld-abc123';
+        process.env.MY_POD_IP = '10.0.0.42';
+
+        const res = await request(app).get('/');
+
+        assert.strictEqual(res.status, 200);
+        assert.strictEqual(res.body.namespace, 'production');
+        assert.strictEqual(res.body.hostname, 'helloworld-abc123');
+        assert.strictEqual(res.body.ip, '10.0.0.42');
+    });
+
+});
+
+describe('unknown routes', () => {
+
+    test('responds with 404', async () => {
+        const res = await request(app).get('/does-not-exist');
+        assert.strictEqual(res.status, 404);
+    });
+
+});
+
+describe('getNetworkInterfaces', () => {
+
+    test('returns external IPv4 addresses keyed by interface name', () => {
+        const ifaces = {
+            eth0: [
+                { family: 'IPv4', internal: false, address: '192.168.1.10' },
+                { family: 'IPv6', internal: false, address: 'fe80::1' }
+            ],
+            eth1: [
+                { family: 'IPv4', internal: false, address: '10.0.0.5' }
+            ]
+        };
+
+        assert.deepStrictEqual(getNetworkInterfaces(ifaces), [
+            { eth0: '192.168.1.10' },
+            { eth1: '10.0.0.5' }
+        ]);
+    });
+
+    test('filters out internal interfaces', () => {
+        const ifaces = {
+            lo: [
+                { family: 'IPv4', internal: true, address: '127.0.0.1' }
+            ]
+        };
+
+        assert.deepStrictEqual(getNetworkInterfaces(ifaces), []);
+    });
+
+    test('filters out non-IPv4 addresses', () => {
+        const ifaces = {
+            eth0: [
+                { family: 'IPv6', internal: false, address: '::1' }
+            ]
+        };
+
+        assert.deepStrictEqual(getNetworkInterfaces(ifaces), []);
+    });
+
+    test('returns an empty array when there are no interfaces', () => {
+        assert.deepStrictEqual(getNetworkInterfaces({}), []);
+    });
+
+});