add Gitea workflow to build and push Docker images

.gitea/workflows/docker-image.yml

@@ -0,0 +1,81 @@
+name: Build and Push Docker Image to Gitea
+
+on:
+  push:
+    branches:
+      - master
+env:
+  REGISTRY: git.apisb.me
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: write
+      attestations: write
+      id-token: write
+
+    steps:
+      # 1. Checkout the repository
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      # 2. Set up Docker Buildx
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+        with:
+          config-inline: |
+            [registry."git.apisb.me"]
+              http = true
+              insecure = true
+
+      # 3. Restore Docker Layer Cache
+      - name: Restore Docker cache
+        uses: actions/cache@v4.2.2
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-docker-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-docker-
+
+      # 4. Log in to Gitea Container Registry
+      - name: Log in to Gitea Container Registry
+        uses: docker/login-action@v2
+        with:
+          registry: git.apisb.me
+          username: ${{ secrets.GITEA_USERNAME }}
+          password: ${{ secrets.GITEA_TOKEN }}
+
+      # 5. Extract metadata (tags, labels) for Docker
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v9
+        with:
+          images: git.apisb.me/${{ env.IMAGE_NAME }}
+          tags: |
+            type=raw,value=latest
+            type=sha
+
+      # 6. Build and push multi-platform Docker image
+      - name: Build and push multi-platform Docker image
+        id: push
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      # 7. Generate artifact attestation
+      - name: Generate artifact attestation
+        uses: actions/attest-build-provenance@v1
+        with:
+          subject-name: git.apisb.me/${{ env.IMAGE_NAME }}
+          subject-digest: ${{ steps.push.outputs.digest }}
+          push-to-registry: true