chore: Github Action push on branches only

Also add push with tags

Author: Eran Davidovich

.github/workflows/docker-image.yml

@@ -1,6 +1,15 @@
 name: Build Docker image
 
-on: [push]
+on:
+  push:
+    branches:
+      - "main"
+    tags:
+      - "v*"
+
+  pull_request:
+    branches:
+      - "main"
 
 jobs:
   docker:
@@ -12,6 +21,12 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v1
 
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: ${{ secrets.DOCKERHUB_USERNAME }}/pyth-client-py
+
       - name: Login to DockerHub
         uses: docker/login-action@v1
         with:
@@ -23,8 +38,9 @@ jobs:
         uses: docker/build-push-action@v2
         with:
           platforms: linux/amd64
-          push: true
-          tags: ${{ secrets.DOCKERHUB_USERNAME }}/pyth-client-py:latest
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
 
       - name: Image digest
         run: echo ${{ steps.docker_build.outputs.digest }}