Next, we have our assets directory. This is where all of the front-end assets (images, CSS, JavaScript, and so on) live, as well as Brunch and NPM. (Your node_modules directory, for example, is found here.) The idea here is that by divorcing your front-end code and files from the rest of the work that Phoenix needs to do, Phoenix's developers can instead focus on making Phoenix great and leave the front-end and asset compilation problems to better solutions such as Brunch or Webpack, as well make asset compilation tool choices separately from those that created the framework. Even though Phoenix comes with Brunch by default, it's still straightforward to replace it with Webpack if that’s more suited to your speed.