Useful websites - Raiper34/knowledge GitHub Wiki
https://css-tricks.com/snippets/javascript/javascript-keycodes/
https://www.responsinator.com/
http://caniuse.com/
https://tools.keycdn.com/speed
https://developers.google.com/speed/pagespeed/insights/
https://blog.codinghorror.com/very-basic-textbox-keyboard-shortcuts/
http://clrs.cc/a11y/
http://howtoubuntu.org/how-to-install-lamp-on-ubuntu
https://glyphsearch.com/?library=material