ci: add supabase validation workflow

.gitea/workflows/ci.yml

@@ -0,0 +1,21 @@
+name: supabase-ci
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  workflow_dispatch:
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Validate Docker Compose syntax
+        run: docker compose -f docker-compose.yml config >/tmp/supabase-compose.rendered.yml
+
+      - name: Build Supabase MCP image
+        working-directory: selfhosted-supabase-mcp
+        run: docker build -t supabase-mcp-ci:${{ github.sha }} .