install Node (v11.10.0 will work) on your machine or “N” or “nvm”
run $(npm install) inside package.json folder
run $(npm start) inside package.json folder
gulp automaticaly watches for .scss changes and compiles children scss-files of scss-folder to css now
Find a plugin for your code-editor to get use of .jsbeautifyrc as second instance for more rules that sass-lint-auto-fix doesn't support. (for vscode: “Beautify”)
Keep package versions up to date if possible. check with $(npm outdated) inside package.json folder