JSTools

'gulp browse'

• looks for changes in index.html, style.sass and script.js and
• initializes browser-sync

this is default task, so just to check the page from 'dev' directoty, use 'gulp'

'gulp prod'

• deletes 'docs' directory (if exists),
• copies images, fonts,
• minifies preprocessed .css and .js files and
• adds it all to 'docs'