Update Caddy workflow for GHCR integration

Author: F-TD5X

.github/workflows/caddy.yaml

@@ -3,11 +3,15 @@ name: caddy
 on:
   workflow_dispatch:
   push:
-    branches: 
+    branches:
       - caddy
 
+permissions:
+  contents: read
+  packages: write
+
 env:
-  IMAGE_NAME: ftd5x/caddy
+  IMAGE_NAME: ghcr.io/f-td5x/caddy
 
 jobs:
   build:
@@ -19,27 +23,30 @@ jobs:
             runner: ubuntu-latest
           - platform: linux/arm64
             runner: ubuntu-24.04-arm
+
     runs-on: ${{ matrix.runner }}
+
     steps:
       - name: Checkout
         uses: actions/checkout@v4
         with:
-          repository: "f-td5x/Dockerfiles"
+          repository: "f-td5x/dockerfiles"
           ref: "caddy"
 
-      - name: Login to DockerHub
+      - name: Log in to GHCR
         uses: docker/login-action@v3
         with:
-          username: ${{ secrets.DOCKER_USERNAME }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
       - name: Prepare platform name for artifacts
         run: |
           platform=${{ matrix.platform }}
-          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV
+          echo "PLATFORM_PAIR=${platform//\//-}" >> "$GITHUB_ENV"
 
       - name: Build and push by digest
         id: build
@@ -54,7 +61,7 @@ jobs:
 
       - name: Export digest
         run: |
-          mkdir -p ${{ runner.temp }}/digests
+          mkdir -p "${{ runner.temp }}/digests"
           digest="${{ steps.build.outputs.digest }}"
           touch "${{ runner.temp }}/digests/${digest#sha256:}"
 
@@ -69,6 +76,7 @@ jobs:
   merge:
     runs-on: ubuntu-latest
     needs: build
+
     steps:
       - name: Download digests
         uses: actions/download-artifact@v4
@@ -77,11 +85,12 @@ jobs:
           pattern: digests-*
           merge-multiple: true
 
-      - name: Login to DockerHub
+      - name: Log in to GHCR
         uses: docker/login-action@v3
         with:
-          username: ${{ secrets.DOCKER_USERNAME }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
@@ -90,8 +99,8 @@ jobs:
         working-directory: ${{ runner.temp }}/digests
         run: |
           docker buildx imagetools create \
-            -t ${{ env.IMAGE_NAME }}:latest \
+            -t "${{ env.IMAGE_NAME }}:latest" \
             $(printf '${{ env.IMAGE_NAME }}@sha256:%s ' *)
 
-      - name: Inspect image (optional, for logs)
-        run: docker buildx imagetools inspect ${{ env.IMAGE_NAME }}:latest
+      - name: Inspect image
+        run: docker buildx imagetools inspect "${{ env.IMAGE_NAME }}:latest"