CI: build docker image on tag push.

Author: caic99

.github/workflows/image.yml

@@ -1,10 +1,10 @@
 name: Build Image
 
 on:
+  workflow_dispatch:
   push:
-    branches:
-      - develop
-
+    tags:
+      - 'v*'
 jobs:
   build_container_and_push:
     runs-on: ubuntu-latest
@@ -13,6 +13,15 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v3
 
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: |
+            ghcr.io/${{ github.repository_owner }}
+            ${{ secrets.DP_HARBOR_REGISTRY }}/dplc
+          tags: type=semver,pattern={{version}}
+
       - name: Setup Docker Buildx
         uses: docker/setup-buildx-action@v1
 
@@ -33,10 +42,6 @@ jobs:
       - name: Build and Push Container
         uses: docker/build-push-action@v2
         with:
-          tags: |
-            ghcr.io/${{ github.repository_owner }}/abacus:latest
-            ${{ secrets.DP_HARBOR_REGISTRY }}/dplc/abacus:latest
+          tags: ${{ steps.meta.outputs.tags }}
           file: Dockerfile
-          cache-from: type=registry,ref=ghcr.io/${{ github.repository_owner }}/abacus:latest
-          cache-to: type=inline
-          push: true
+          push: ${{ github.event_name == 'push' }}