change workflow to build and publish to ghcr.io

Author: simon mittelberger

.github/workflows/docker-image.yml

@@ -2,15 +2,54 @@ name: Docker Image CI
 
 on:
   push:
+    branches: [ "release" ]
     tags: [ "*.*.*" ]
 
-jobs:
-
-  build:
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: vsftpd
 
+jobs:
+  build-and-push-image:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      attestations: write
+      id-token: write
 
     steps:
-    - uses: actions/checkout@v4
-    - name: Build the Docker image
-      run: docker build . --file Dockerfile --tag vsftpd:$(date +%s)
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Log in to the Container registry
+      uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
+      with:
+        registry: ${{ env.REGISTRY }}
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Extract metadata (tags, labels) for Docker
+      id: meta
+      uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
+      with:
+        images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+    - name: Build and push Docker image
+      id: push
+      uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
+      with:
+        context: .
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+
+    - name: Generate artifact attestation
+      uses: actions/attest-build-provenance@v3
+      with:
+        subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME}}
+        subject-digest: ${{ steps.push.outputs.digest }}
+        push-to-registry: true
+
+    # - name: Build the Docker image
+    #   run: docker build . --file Dockerfile --tag vsftpd:$(date +%s)