ci: add Docker build and push to Gitea registry

.gitea/workflows/ci.yml

@@ -132,3 +132,49 @@ jobs:
         env:
           GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
         run: goreleaser release --clean
+
+  docker:
+    name: Build & Push Docker Image
+    runs-on: ubuntu-latest
+    needs: [test, lint]
+    if: github.event_name == 'push' && (github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/'))
+    container:
+      image: docker:24-cli
+      options: --privileged
+    services:
+      docker:
+        image: docker:24-dind
+        options: --privileged
+    steps:
+      - name: Install dependencies
+        run: apk add --no-cache git curl
+
+      - name: Checkout code
+        run: |
+          git config --global --add safe.directory "$GITHUB_WORKSPACE"
+          git clone --depth 1 --branch ${GITHUB_REF_NAME} ${{ env.GITEA_URL }}/${GITHUB_REPOSITORY}.git .
+
+      - name: Set up Docker Buildx
+        run: |
+          docker buildx create --use --name builder --driver docker-container
+          docker buildx inspect --bootstrap
+
+      - name: Login to Gitea Registry
+        run: |
+          echo "${{ secrets.REGISTRY_TOKEN }}" | docker login git.uuxo.net -u "${{ secrets.REGISTRY_USER }}" --password-stdin
+
+      - name: Build and push
+        run: |
+          # Determine tags
+          if [[ "${GITHUB_REF}" == refs/tags/* ]]; then
+            VERSION=${GITHUB_REF#refs/tags/}
+            TAGS="-t git.uuxo.net/uuxo/dbbackup:${VERSION} -t git.uuxo.net/uuxo/dbbackup:latest"
+          else
+            TAGS="-t git.uuxo.net/uuxo/dbbackup:${GITHUB_SHA::8} -t git.uuxo.net/uuxo/dbbackup:main"
+          fi
+          
+          docker buildx build \
+            --platform linux/amd64,linux/arm64 \
+            --push \
+            ${TAGS} \
+            .