feat: Add context7-mcp with custom Dockerfile

- Create dockerfiles/context7/Dockerfile for monorepo build
- Update docker-compose.yml to use custom Dockerfile context
- Build approach: copy all source, then pnpm install workspaces, then build:mcp
- Requires UPSTASH_REDIS_REST_URL and UPSTASH_REDIS_REST_TOKEN env vars
- Follows AGENTS.md guidelines for Dockerfile management

Note: Monorepo structure requires full source copy before dependency resolution
to properly install workspace dependencies across packages/mcp, packages/sdk, etc.

docker-compose.yml

@@ -144,13 +144,12 @@ services:
   context7-mcp:
     build:
       context: ./vendor/context7
-      dockerfile: Dockerfile
+      dockerfile: ../../dockerfiles/context7/Dockerfile
     container_name: KNELDevStack-AIMiddleware-context7-mcp
     restart: unless-stopped
     environment:
       - UPSTASH_REDIS_REST_URL=${UPSTASH_REDIS_REST_URL}
       - UPSTASH_REDIS_REST_TOKEN=${UPSTASH_REDIS_REST_TOKEN}
-    command: ["node", "packages/mcp/dist/index.js", "--transport", "stdio"]
     profiles:
       - dev