add references

Author: tienbku

README.md

@@ -24,6 +24,13 @@ Fullstack:
 
 > [ANgular 11 + Node.js + Express + PostgreSQL example](https://bezkoder.com/angular-11-node-js-express-postgresql/)
 
+Integration (run back-end & front-end on same server/port)
+> [Integrate React with Node.js Restful Services](https://bezkoder.com/integrate-react-express-same-server-port/)
+
+> [Integrate Angular with Node.js Restful Services](https://bezkoder.com/integrate-angular-10-node-js/)
+
+> [Integrate Vue with Node.js Restful Services](https://bezkoder.com/serve-vue-app-express/)
+
 ## Project setup
 ```
 npm install