Gate Docker build on CI passing, fix frontend embed in test job

Author: gdarko

.github/workflows/ci.yml

@@ -8,6 +8,7 @@ on:
 
 permissions:
   contents: read
+  packages: write
 
 jobs:
   test:
@@ -27,8 +28,46 @@ jobs:
       - name: Typecheck frontend
         run: cd frontend && bunx tsc -b --noEmit
 
+      - name: Build frontend
+        run: |
+          cd frontend && bun run build
+          cp -r dist ../internal/frontend/dist
+
       - name: Go vet
         run: go vet ./...
 
       - name: Go test
         run: go test ./...
+
+  docker:
+    if: github.ref == 'refs/heads/main' && github.event_name == 'push'
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: docker/setup-buildx-action@v3
+
+      - uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - uses: docker/metadata-action@v5
+        id: meta
+        with:
+          images: ghcr.io/${{ github.repository }}
+          tags: |
+            type=raw,value=main
+            type=sha,prefix=sha-
+
+      - uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          platforms: linux/amd64,linux/arm64
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max