How to Install Bootstrap Package in ASP.NET Core Application in Visual Studio
https://www.yogihosting.com/install-bootstrap-aspnet-core/
How to Add Bootstrap SASS to ASP.NET Core
https://www.dotnetcatch.com/2019/05/16/adding-bootstrap-sass-to-asp-net-core/
How to use SASS to create new set of color styles in Bootstrap 4
https://www.geeksforgeeks.org/how-to-use-sass-to-create-new-set-of-color-styles-in-bootstrap-4/
How Do You Remove Unused CSS From a Site?
https://css-tricks.com/how-do-you-remove-unused-css-from-a-site/