Update build file to push docker image only on release

Fix #913

.github/workflows/build.yaml

@@ -18,23 +18,32 @@
 #
 name: Build
 on:
- push:
- branches:
- - master
+ release:
+ types: [released]
 
 jobs:
  docker:
  runs-on: ubuntu-latest
  steps:
+ - name: Checkout repository
+ uses: actions/checkout@v3
  - name: Login to DockerHub
  uses: docker/login-action@v2
  with:
  username: ${{ secrets.DOCKERHUB_USERNAME }}
  password: ${{ secrets.DOCKERHUB_PASSWORD }}
+ - name: Docker meta
+ id: meta
+ uses: docker/metadata-action@v4
+ with:
+ images: |
+ apache/eventmesh
+
  - name: Build and push
- uses: docker/build-push-action@v3
+ uses: docker/build-push-action@v4
  with:
  push: true
- tags: eventmesh/eventmesh:latest
+ tags: ${{ steps.meta.outputs.tags }}
+ labels: ${{ steps.meta.outputs.labels }}
  file: ./docker/Dockerfile
  context: ./