Update docker-image.yml

.github/workflows/docker-image.yml

@@ -3,8 +3,14 @@ name: Docker Image CI
 on:
   push:
     branches: [ master ]
-#   pull_request:
-#     branches: [ master ]
+    tags:
+      - 'v*'
+  pull_request:
+    branches: [ master ]
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
 
 jobs:
 
@@ -20,15 +26,28 @@ jobs:
     - uses: actions/checkout@v2
 
     - name: Log in to the Container registry
+      if: github.event_name != 'pull_request'
       uses: docker/login-action@v1
       with:
         registry: ${{ env.REGISTRY }}
         username: ${{ github.actor }}
         password: ${{ secrets.GITHUB_TOKEN }}
 
+    - name: Extract metadata (tags, labels) for Docker
+      id: meta
+      uses: docker/metadata-action@v3
+      with:
+        images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+        tags: |
+          type=ref,event=branch
+          type=ref,event=pr
+          type=semver,pattern={{version}}
+          type=semver,pattern={{major}}.{{minor}}
+
     - name: Build and push Docker image
       uses: docker/build-push-action@v2
       with:
         context: .
-        push: true
-        tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
+        push: ${{ github.event_name != 'pull_request' }}
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}