Refactor docker release in GitHub workflow (#1510)

Signed-off-by: NJohn Niang <johnniang@fastmail.com>

.github/workflows/halo.yml

@@ -3,14 +3,14 @@ name: Halo CI
 on:
   pull_request:
     paths:
-      - '**'
-      - '!**.md'
+      - "**"
+      - "!**.md"
   push:
     branches:
-      - '**'
+      - "**"
     paths:
-      - '**'
-      - '!**.md'
+      - "**"
+      - "!**.md"
   release:
     types: # This configuration does not affect the page_build event above
       - created
@@ -109,45 +109,46 @@ jobs:
       - uses: actions/checkout@v2
         with:
           submodules: true
-      - name: Set up JDK 11
-        uses: actions/setup-java@v2
+      - name: Download halo jar
+        uses: actions/download-artifact@v2
         with:
-          distribution: 'temurin'
-          cache: 'gradle'
-          java-version: 11
-      - name: Get version of halo
-        id: get_halo_version
-        run: |
-          version=$(./gradlew -q projectVersion)
-          echo "Trying to build and publish halo:${version}"
-          echo "HALO_VERSION=${version}" >> $GITHUB_ENV
+          name: halo-jar
+          path: build/libs
+      - name: Docker meta for Halo
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: |
+            halohub/halo
+            ghcr.io/${{ github.repository_owner }}/halo
+          tags: |
+            type=schedule
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{ version }}
+            type=semver,pattern={{major}}.{{minor}}
+            type=sha
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v1
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v1
-      -
-        name: Login to DockerHub
+      - name: Login to DockerHub
         uses: docker/login-action@v1
         with:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_TOKEN }}
-      -
-        name: Build and push with version tag
-        uses: docker/build-push-action@v2
+      - name: Login to GHCR
+        uses: docker/login-action@v1
         with:
-          context: .
-          file: ./Dockerfile
-          platforms: ${{ secrets.DOCKER_PLATFORMS }}
-          push: true
-          tags: |
-            ${{ secrets.DOCKER_IMAGE_NAME }}:${{ env.HALO_VERSION}}
-      - name: Build and push with latest tag
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GHCR_TOKEN }}
+      - name: Build and push
         uses: docker/build-push-action@v2
-        if: "!github.event.release.prerelease"
         with:
           context: .
           file: ./Dockerfile
-          platforms: ${{ secrets.DOCKER_PLATFORMS }}
+          platforms: linux/amd64,linux/arm/v7,linux/arm64
+          labels: ${{ steps.meta.outputs.labels }}
+          tags: ${{ steps.meta.outputs.tags }}
           push: true
-          tags: |
-            ${{ secrets.DOCKER_IMAGE_NAME }}:latest