Update GitHub Actions docker build/push workflow

Author: jake-low

.github/workflows/docker-publish.yml

@@ -2,34 +2,50 @@ name: Build Docker Image, Push to GHCR
 
 on:
   push:
-    branches:
-    - master
+    branches: [ "main" ]
+    tags: [ 'v*.*.*' ]
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: osmcha/osmcha-django
 
 jobs:
   build:
     runs-on: ubuntu-latest
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
+    # Enable BuildKit for docker builds. This enables building
+    # multi-platform images and exporting the layer cache
+    # https://github.com/docker/setup-buildx-action
     - name: Set up Docker Buildx
-      uses: docker/setup-buildx-action@v1
+      uses: docker/setup-buildx-action@v3
 
-    - name: Login to GitHub Container Registry
-      uses: docker/login-action@v2
+    # https://github.com/docker/login-action
+    - name: Login to Registry ${{ env.REGISTRY }}
+      uses: docker/login-action@v3
       with:
-        registry: ghcr.io
+        registry: ${{ env.REGISTRY }}
         username: ${{ github.actor }}
         password: ${{ secrets.GITHUB_TOKEN }}
 
+    # Extract metadata (tags, labels) for Docker
+    # https://github.com/docker/metadata-action
+    - name: Extract Docker metadata
+      id: meta
+      uses: docker/metadata-action@v5
+      with:
+        images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+    # https://github.com/docker/build-push-action
     - name: Build and push Docker image
-      uses: docker/build-push-action@v4
+      uses: docker/build-push-action@v5
       with:
         context: .
         push: true
-        tags: |
-          ghcr.io/osmcha/osmcha-django:latest
-          ghcr.io/osmcha/osmcha-django:${{ github.sha }}
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
         cache-from: type=gha
-        cache-to: type=gha,mode=max
+        cache-to: type=gha,mode=max