feat: add image build

.forgejo/workflows/build.yaml

@@ -0,0 +1,47 @@
+name: Build image
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: hetzner
+    steps:
+      - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3
+        with:
+          github-server-url: https://code.mor.re
+
+      - name: Set up QEMU
+        uses: https://github.com/docker/setup-qemu-action@2b82ce82d56a2a04d2637cd93a637ae1b359c0a7 # v2.2.0
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: https://github.com/docker/setup-buildx-action@4c0219f9ac95b02789c1075625400b2acbff50b1 # v2.9.1
+
+      - name: Login to registry
+        if: github.event_name != 'pull_request'
+        uses: https://github.com/docker/login-action@465a07811f14bebb1938fbed4728c6a1ff8901fc # v2.2.0
+        with:
+          registry: code.mor.re
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.REGISTRY_TOKEN }}
+
+      - name: Docker meta
+        id: meta
+        uses: https://github.com/docker/metadata-action@818d4b7b91585d195f67373fd9cb0332e31a7175 # v4.6.0
+        with:
+          flavor: |
+            latest=false
+          images: |
+            code.mor.re/${{ github.repository }}
+
+      - name: Build and push
+        uses: https://github.com/docker/build-push-action@2eb1c1961a95fc15694676618e422e8ba1d63825 # v4.1.1
+        with:
+          platforms: linux/amd64,linux/arm64
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}