ci: add build check

.gitea/workflows/ci.yaml

@@ -3,6 +3,9 @@ name: CI
 on:
   pull_request:
 
+env:
+  DOCKER_REGISTRY: gitea.t000-n.de
+
 jobs:
   test:
     name: Test
@@ -32,3 +35,40 @@ jobs:
 
       - name: Run spellcheck
         run: bun run check:spell
+
+  build-check:
+    name: Build check
+    runs-on:
+      - ubuntu-latest
+      - linux_amd64
+    steps:
+      - name: Checkout
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0
+
+      - name: Login to Registry
+        uses: docker/login-action@4907a6ddec9925e35a0a9e82d7399ccc52663121 # v4.1.0
+        with:
+          registry: ${{ env.DOCKER_REGISTRY }}
+          username: ${{ secrets.REGISTRY_USER }}
+          password: ${{ secrets.REGISTRY_PASSWORD }}
+
+      - name: Get Metadata
+        id: meta
+        run: |
+          echo REPO_NAME=$(echo ${GITHUB_REPOSITORY} | awk -F"/" '{print $2}' | tr '[:upper:]' '[:lower:]') >> $GITHUB_OUTPUT
+          echo REPO_VERSION=$(git describe --tags --always | sed 's/^v//') >> $GITHUB_OUTPUT
+
+      - name: Build image
+        uses: docker/build-push-action@bcafcacb16a39f128d818304e6c9c0c18556b85f # v7.1.0
+        with:
+          context: .
+          file: ./Dockerfile
+          platforms: linux/amd64
+          push: false
+          load: true
+          provenance: false
+          cache-from: type=registry,ref=${{ env.DOCKER_REGISTRY }}/t.behrendt/${{ steps.meta.outputs.REPO_NAME }}:cache
+          cache-to: type=registry,ref=${{ env.DOCKER_REGISTRY }}/t.behrendt/${{ steps.meta.outputs.REPO_NAME }}:cache,mode=max