https://www.bootstrapcdn.com/bootswatch/
node.js
go to Arduino libraries folder then do:
git clone https://github.com/alexsuslov/ESPEasyUI.git
cd ESPEasyUI
npm i
You can edit source files (only coffee and jade folders), then
gulp
after view result you ready to buld .h files
for MAC and Linux
./build.sh
for Windows
build-win.cmd
after build you can see generated .h files for ESPEasy project