Started an FAQ doc

[ci skip]

README.md

@@ -117,6 +117,10 @@ cd my-module/
 - [Plugins](/docs/Plugins.md#plugins)
 - [Middleware](/docs/Middleware.md#middleware)
 - [Examples](/docs/Examples.md#examples)
+- [Frequently Asked Questions](/docs/FAQ.md#frequently-asked-questions)
+
+---
+
 - [Versioning](/docs/Versioning.md#versioning)
 
 ## Why use nwb?

docs/FAQ.md

@@ -0,0 +1,28 @@
+## Frequently Asked Questions
+
+### How do I enable CSS Modules?
+
+Use `nwb.config.js` to configure the [default `css` loader for your app's own styles](/docs/Configuration.md#default-loaders) with the necessary [css-loader `query` parameters](https://github.com/webpack/css-loader#local-scope):
+
+```js
+module.exports = {
+  webpack: {
+    loaders: {
+      css: {
+        modules: true,
+        localIdentName: (
+          process.env.NODE_ENV === 'production'
+            ? '[path][name]-[local]-[hash:base64:5]'
+            : '[hash:base64:5]'
+        )
+      }
+    }
+  }
+}
+```
+
+### Why am I seeing `.json.gzip` files in my project root?
+
+Are you running as root on a Mac, or in a Docker container?
+
+npm appers to [set the working directory as the temporary directory](https://github.com/npm/npm/issues/4531) in these scenarios and babel-loader writes to the temporary directory to cache results for performance.

docs/README.md

@@ -15,4 +15,8 @@
 - [Plugins](/docs/Plugins.md#plugins)
 - [Middleware](/docs/Middleware.md#middleware)
 - [Examples](/docs/Examples.md#examples)
+- [Frequently Asked Questions](/docs/FAQ.md#frequently-asked-questions)
+
+---
+
 - [Versioning](/docs/Versioning.md#versioning)