The following instructions describe how to build the 'main.js' used by the
tower and buoy meteorogram web applications.

1. Install NPM and Node.js to be able to download/install dependencies
2. Change to the same directory as this README file.
3. Run `npm install`
5. Run webpack to combine all javascript files in one file (for development):

    npm run webpack

For production (final) version:

    NODE_ENV=production npm run webpack

Which will minify the final javascript file.