Update build.yaml

Author: stefanodvx

.github/workflows/build.yaml

@@ -1,4 +1,4 @@
-name: build docker image
+name: build docker on push
 
 on:
   push:
@@ -10,12 +10,22 @@ permissions:
   packages: write
 
 env:
-  IMAGE: govdbot/migrate:latest
-  GHCR_IMAGE: ghcr.io/${{ github.repository_owner }}/${{ github.event.repository.name }}:latest
+  IMAGE: govdbot/${{ github.event.repository.name }}:${{ github.ref_name }}
+  GHCR_IMAGE: ghcr.io/${{ github.repository_owner }}/${{ github.event.repository.name }}:${{ github.ref_name }}
 
 jobs:
-  build:
-    runs-on: ubuntu-24.04
+  build-images:
+    strategy:
+      matrix:
+        arch: [amd64, arm64]
+        include:
+          - arch: amd64
+            platform: linux/amd64
+            runner: ubuntu-24.04
+          - arch: arm64
+            platform: linux/arm64
+            runner: ubuntu-24.04-arm
+    runs-on: ${{ matrix.runner }}
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -36,24 +46,48 @@ jobs:
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Build and push multi-arch image to Docker Hub
+      - name: Build and push ${{ matrix.arch }} image
         uses: docker/build-push-action@v6
         with:
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
           context: .
-          file: ./Dockerfile
+          platforms: ${{ matrix.platform }}
           push: true
-          platforms: linux/amd64,linux/arm64
+          file: ./Dockerfile
+          tags: |
+            ${{ env.IMAGE }}-${{ matrix.arch }}
+            ${{ env.GHCR_IMAGE }}-${{ matrix.arch }}
+
+  push-manifest:
+    needs: [build-images]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Create tagged manifest
+        uses: int128/docker-manifest-create-action@v2
+        with:
           tags: ${{ env.IMAGE }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
+          sources: |
+            ${{ env.IMAGE }}-amd64
+            ${{ env.IMAGE }}-arm64
 
-      - name: Build and push multi-arch image to GHCR
-        uses: docker/build-push-action@v6
+      - name: Create tagged manifest for GitHub
+        uses: int128/docker-manifest-create-action@v2
         with:
-          context: .
-          file: ./Dockerfile
-          push: true
-          platforms: linux/amd64,linux/arm64
           tags: ${{ env.GHCR_IMAGE }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
+          sources: |
+            ${{ env.GHCR_IMAGE }}-amd64
+            ${{ env.GHCR_IMAGE }}-arm64