Add Kaniko build check

.gitea/workflows/kaniko-check.yaml

@@ -0,0 +1,22 @@
+name: Check Kaniko Build (Safe)
+on: [push, workflow_dispatch]
+
+jobs:
+  kaniko-build:
+    runs-on: macos-m1
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Create Dockerfile
+        run: |
+          echo "FROM alpine" > Dockerfile
+          echo "RUN echo 'Kaniko build successful'" >> Dockerfile
+
+      - name: Build with Kaniko
+        # Kaniko runs as a standalone container for this step
+        uses: docker://gcr.io/kaniko-project/executor:debug
+        with:
+          # --no-push just builds it to verify it works. 
+          # To push, you would add --destination registry/image:tag
+          args: --context . --dockerfile Dockerfile --no-push