Update workflow

.github/workflows/docker-hub.yml

@@ -1,21 +1,32 @@
 name: Publish Docker image
 on:
-  release:
-    types: [published]
+  workflow_dispatch:
+  push:
+    tags:
+      - 'v*'
 jobs:
   push_to_registry:
     name: Push Docker image to Docker Hub
     runs-on: ubuntu-latest
     steps:
       - name: Check out the repo
         uses: actions/checkout@v2
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: flinkwise/postgres_notifier
+
       - name: Log in to Docker Hub
         uses: docker/login-action@v1
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
+
       - name: Push to Docker Hub
-        uses: docker/build-push-action@v2
+        uses: docker/build-push-action@v4
         with:
+          context: .
           push: true
-          tags: flinkwise/postgres_notifier:latest
+          tags: ${{ steps.meta.outputs.tags }}