An express server that serves libraries published to npm.
A request of the form: http://napalm-server/underscore/1.4.4/underscore.js will result in the underscore.js file being served if email@example.com has been published to npm and that file exists in its root.
The server installs and caches the npm modules it attempts to serve.
Self-contained express app server:
npm install; // to install that app once clonednode app; // to run the express app
http://host:4000 // to access the app locally.