title: How to integrate external dependencies in a web app
body: <p>I am writing my first web application using npm, nodejs and react components. This is all rather new stuff for me.</p>
  
  <p>I need to deploy this web application on an server in a LAN. Both the server and the clients have no access to the internet. I followed some tutorials to instantiate my first implementation of the web app. The problem is that now the web application references libraries and css via CDN links (e.g. specified in index.html).</p>
  
  <p>My question is if there is a standard and automatic way to build the web application so that the building process would automatically download all the external dependencies and convert all the references from the outside world to the local paths.</p>