feat(ci): add grype vuln scan of devcontainer

.github/workflows/anchore.yml

@@ -0,0 +1,48 @@
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+# This workflow checks out code, builds an image, performs a container image
+# vulnerability scan with Anchore's Grype tool, and integrates the results with GitHub Advanced Security
+# code scanning feature.  For more information on the Anchore scan action usage
+# and parameters, see https://github.com/anchore/scan-action. For more
+# information on Anchore's container image scanning tool Grype, see
+# https://github.com/anchore/grype
+name: Anchore Grype vulnerability scan
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ "main" ]
+  schedule:
+    - cron: '26 4 * * 1'
+
+permissions:
+  contents: read
+
+jobs:
+  Anchore-Build-Scan:
+    permissions:
+      contents: read # for actions/checkout to fetch code
+      security-events: write # for github/codeql-action/upload-sarif to upload SARIF results
+      actions: read # only required for a private repository by github/codeql-action/upload-sarif to get the Action run status
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out the code
+      uses: actions/checkout@v4
+    - name: Build the Docker image
+      run: docker build . --file dev-opentofu/.devcontainer/Dockerfile --tag localbuild/testimage:latest
+    - name: Run the Anchore Grype scan action
+      uses: anchore/scan-action@d5aa5b6cb9414b0c7771438046ff5bcfa2854ed7
+      id: scan
+      with:
+        image: "localbuild/testimage:latest"
+        fail-build: true
+        severity-cutoff: critical
+    - name: Upload vulnerability report
+      uses: github/codeql-action/upload-sarif@v3
+      with:
+        sarif_file: ${{ steps.scan.outputs.sarif }}