Scope down to local Docker testing, drop Gitea/K3s plumbing for now

This is a pilot project — running it via docker compose locally is enough
for now. Deploy/CI can come back once the project is greenlit for real use.

Also fixes claude invocation: add --strict-mcp-config (verified against
the actual installed claude-code CLI --help) so only agent-news' own MCP
server is loaded, not whatever else might be discoverable in the environment.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

docker-compose.yml

@@ -0,0 +1,12 @@
+services:
+  agent-news:
+    build:
+      context: .
+      dockerfile: runner/Dockerfile
+    env_file: .env
+    volumes:
+      - claude-home:/home/agent/.claude
+    restart: unless-stopped
+
+volumes:
+  claude-home: