yarn
./node_modules/brunch/bin/brunch watch --server
Now you can modify any source and have the website reloaded in your browser.
./node_modules/brunch/bin/brunch build --production
The website will be located in the www/ folder, minified and all. For production usage.
You might need to change few URL calls, just replace localhost:8600 by the URL you want in the 2 or 3 files where such URLs exist.