The best practice to add custom SCSS or JS in Laravel Start Kit is to use the `addJavascriptFile()` function. This function takes a path to a JavaScript file as its argument. For example, to add the file `assets/js/custom/authentication/sign-in/general.js`, you would use the following code:
You can also use the `addStylesheet()` function to add a custom SCSS file. This function takes a path to a SCSS file as its argument. For example, to add the file `assets/scss/custom/authentication/sign-in/general.scss`, you would use the following code: