CodeIgniter4
https://codeigniter.com/
download: https://codeigniter.com/download
document: https://codeigniter.com/user_guide/index.html
Bootstrap4
https://getbootstrap.com/
https://getbootstrap.com/docs/4.5/getting-started/download/
Bootstrap Icons
https://icons.getbootstrap.com/
google fonts
https://fonts.google.com/
AngularJS
https://angularjs.org/