ci: add Gitea Actions workflow and Docker Compose test runner; add test image\n\ngovernance: encode CI/containers rules in system prompts and AGENTS templates; update proposal and docs

.gitea/workflows/ci.yml

@@ -0,0 +1,17 @@
+name: ci
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Build and run tests via Docker
+        run: |
+          docker compose -f docker/compose.yml up --build --abort-on-container-exit --remove-orphans
+          docker compose -f docker/compose.yml down -v --remove-orphans
+