github: apply docker/metadata-action

.github/workflows/docker.yml

@@ -12,6 +12,22 @@ jobs:
   docker:
     runs-on: ubuntu-latest
     steps:
+    - name: Docker meta
+      id: meta
+      uses: docker/metadata-action@v3
+      with:
+        # list of Docker images to use as base name for tags
+        images: |
+          yoanlin/bbgo
+        # generate Docker tags based on the following events/attributes
+        tags: |
+          type=schedule
+          type=ref,event=branch
+          type=ref,event=pr
+          type=semver,pattern={{version}}
+          type=semver,pattern={{major}}.{{minor}}
+          type=semver,pattern={{major}}
+          type=sha
     - name: Set up QEMU
       uses: docker/setup-qemu-action@v1
     - name: Set up Docker Buildx
@@ -26,4 +42,6 @@ jobs:
       uses: docker/build-push-action@v2
       with:
         push: true
-        tags: c9s/bbgo:latest
+        # tags: yoanlin/bbgo:latest
+        labels: ${{ steps.meta.outputs.labels }}
+        tags: ${{ steps.meta.outputs.tags }}