feat: add publish on release and proper tags

Author: jescalada

.github/workflows/docker-publish.yml

@@ -3,6 +3,8 @@ name: Build and Publish Docker Image
 on:
   push:
     branches: [main]
+  release:
+    types: [published]
 
 jobs:
   docker-build-publish:
@@ -17,18 +19,27 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Log in to Docker Hub
-        if: github.ref == 'refs/heads/main' && github.repository == 'finos/git-proxy'
+        if: github.repository == 'finos/git-proxy'
         uses: docker/login-action@v3
         with:
           username: finos
           password: ${{ secrets.DOCKER_PASSWORD }}
 
+      - name: Set Docker Image Tag
+        id: tags
+        run: |
+          if [ "${{ github.event_name }}" = "release" ]; then
+            echo "tags=finos/git-proxy:${{ github.ref_name }},finos/git-proxy:latest" >> $GITHUB_OUTPUT
+          else
+            echo "tags=finos/git-proxy:main" >> $GITHUB_OUTPUT
+          fi
+
       - name: Build and Publish Docker Image
-        if: github.ref == 'refs/heads/main' && github.repository == 'finos/git-proxy'
+        if: github.repository == 'finos/git-proxy'
         uses: docker/build-push-action@v6
         with:
           context: .
           file: Dockerfile
           push: true
-          tags: finos/git-proxy:latest
+          tags: ${{ steps.tags.outputs.tags }}
           provenance: true