• Sass
• Gulp Inline CSS: https://www.npmjs.com/package/gulp-inline-css
• NPM, Gulp

Do not edit inside the build folder. Edit the index.html in root and the sass within the /scss folder

Ensure that Sass is ported to style.css in root when building, that will be the css that is inlined.

In the command line, navigate to the folder containing this project.

npm install --save-dev gulp-inline-css

gulp

This will build the index.html with inlined css. The file will be output to /build