image metadata tagging

.forgejo/workflows/docker-build.yaml

@@ -1,7 +1,4 @@
-on:
-  push:
-    branches:
-      - 'main'
+on: [push]
 jobs:
   build-container:
     runs-on: docker
@@ -11,10 +8,15 @@ jobs:
       - run: apk add --no-cache nodejs git
       - name: login to container registry
         run: echo "${{ secrets.PACKAGE_PUBLISH_TOKEN }}" | docker login --username finn --password-stdin git.janky.solutions
+      - uses: https://github.com/docker/metadata-action
+        id: meta
+        with:
+          images: git.janky.solutions/finn/lockserver
       - name: build container image
         uses: docker/build-push-action@v4
         with:
           file: Containerfile
-          tags: git.janky.solutions/finn/lockserver:latest
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
           platforms: linux/amd64,linux/arm64,linux/armv7l
           push: true