Build image on push

.forgejo/workflows/image.yaml

@@ -0,0 +1,26 @@
+name: image
+
+on:
+  push:
+    branches:
+      - 'main'
+  workflow_dispatch:
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Login to Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: git.hamburg.ccc.de
+          username: ${{ secrets.REGISTRY_USERNAME }}
+          password: ${{ secrets.REGISTRY_TOKEN }}
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          push: true
+          platforms: linux/amd64,linux/arm64
+          tags: git.hamburg.ccc.de/ccchh/yate-image/yate-image:latest