Publish on Docker Hub

.github/workflows/docker-publish.yml

@@ -21,7 +21,8 @@ on:
 
 env:
   # Use docker.io for Docker Hub if empty
-  REGISTRY: ghcr.io
+  GITHUB_REGISTRY: ghcr.io
+  DOCKER_REGISTRY: docker.io
   # github.repository as <account>/<repo>
   IMAGE_NAME: ${{ github.repository }}
 
@@ -30,6 +31,7 @@ jobs:
 
   # Run tests.
   test:
+    name: Test
     runs-on: ubuntu-latest
 
     steps:
@@ -45,11 +47,12 @@ jobs:
           fi
 
   # Push image to GitHub Packages.
-  push:
+  push-to-github-packages:
 
     # Ensure test job passes before pushing image.
     needs: test
 
+    name: Build & Push to GitHub Registry
     runs-on: ubuntu-latest
     permissions:
       contents: read
@@ -67,11 +70,11 @@ jobs:
 
       # Login against a Docker registry except on PR
       # https://github.com/docker/login-action
-      - name: Log into registry ${{ env.REGISTRY }}
+      - name: Log into registry ${{ env.GITHUB_REGISTRY }}
         if: github.event_name != 'pull_request'
         uses: docker/login-action@v1
         with:
-          registry: ${{ env.REGISTRY }}
+          registry: ${{ env.GITHUB_REGISTRY }}
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
@@ -81,7 +84,7 @@ jobs:
         id: meta
         uses: docker/metadata-action@v3
         with:
-          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          images: ${{ env.GITHUB_REGISTRY }}/${{ env.IMAGE_NAME }}
           tags: |
             type=ref,event=branch
             type=semver,pattern={{version}}
@@ -99,3 +102,60 @@ jobs:
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+
+  # Push image to Docker Hub.
+  push-to-docker-hub:
+
+    # Ensure test job passes before pushing image.
+    needs: test
+
+    name: Build & Push to Docker Hub
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+      
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      # Login against a Docker registry except on PR
+      # https://github.com/docker/login-action
+      - name: Log into registry ${{ env.DOCKER_REGISTRY }}
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v1
+        with:
+          registry: ${{ env.DOCKER_REGISTRY }}
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      # Extract metadata (tags, labels) for Docker
+      # https://github.com/docker/metadata-action
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: ${{ env.IMAGE_NAME }}
+          tags: |
+            type=ref,event=branch
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}.{{minor}}.{{patch}}
+
+      # Build and push Docker image with Buildx (don't push on PR)
+      # https://github.com/docker/build-push-action
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64,linux/arm/v7,linux/arm/v6
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}