Switch to Kaniko for container builds

Kaniko doesn't require Docker daemon, works better in K8s

Co-Authored-By: Claude Sonnet 4.5 (1M context) <noreply@anthropic.com>

.gitea/workflows/build.yml

@@ -5,48 +5,31 @@ on:
     branches: [main, develop]
     tags:
       - 'v*'
-  pull_request:
-    branches: [main]
 
 jobs:
   build:
     runs-on: ubuntu-latest
+    container:
+      image: gcr.io/kaniko-project/executor:debug
+      options: --privileged
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
 
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+      - name: Prepare Kaniko config
+        run: |
+          mkdir -p /kaniko/.docker
+          echo "{\"auths\":{\"git.fuq.tv\":{\"auth\":\"$(echo -n admin:${{ secrets.REGISTRY_TOKEN }} | base64)\"}}}" > /kaniko/.docker/config.json
 
-      - name: Extract metadata
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: git.fuq.tv/admin/aiworker-backend
-          tags: |
-            type=ref,event=branch
-            type=ref,event=pr
-            type=semver,pattern={{version}}
-            type=semver,pattern={{major}}.{{minor}}
-            type=sha,prefix={{branch}}-
-            type=raw,value=latest,enable={{is_default_branch}}
+      - name: Build and push with Kaniko
+        run: |
+          /kaniko/executor \
+            --context=$GITHUB_WORKSPACE \
+            --dockerfile=Dockerfile \
+            --destination=git.fuq.tv/admin/aiworker-backend:latest \
+            --destination=git.fuq.tv/admin/aiworker-backend:${GITHUB_SHA::7} \
+            --cache=true \
+            --cache-repo=git.fuq.tv/admin/aiworker-backend/cache
 
-      - name: Login to Gitea Registry
-        uses: docker/login-action@v3
-        with:
-          registry: git.fuq.tv
-          username: admin
-          password: ${{ secrets.REGISTRY_TOKEN }}
-
-      - name: Build and push
-        uses: docker/build-push-action@v5
-        with:
-          context: .
-          push: ${{ github.event_name != 'pull_request' }}
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=registry,ref=git.fuq.tv/admin/aiworker-backend:buildcache
-          cache-to: type=registry,ref=git.fuq.tv/admin/aiworker-backend:buildcache,mode=max
-
-      - name: Image digest
-        run: echo ${{ steps.meta.outputs.tags }}
+      - name: Image pushed
+        run: echo "Image pushed to git.fuq.tv/admin/aiworker-backend:latest"