docs(configuration) Include a tip for require.context and watching (#2245)

* Include a tip for require.context and watching

* Amend strings to use single quotes

Author: spicalous

src/content/configuration/watch.md

@@ -7,6 +7,7 @@ contributors:
   - SpaceK33z
   - EugeneHlushko
   - byzyk
+  - spicalous
 ---
 
 webpack can watch files and recompile whenever they change. This page explains how to enable this and a couple of tweaks you can make if watching does not work properly for you.
@@ -74,17 +75,19 @@ module.exports = {
 };
 ```
 
-It is also possible to use [anymatch](https://github.com/micromatch/anymatch) patterns:
+It is also possible to have and use multiple [anymatch](https://github.com/micromatch/anymatch) patterns:
 
 ```js
 module.exports = {
   //...
   watchOptions: {
-    ignored: 'files/**/*.js'
+    ignored: ['files/**/*.js', 'node_modules']
   }
 };
 ```
 
+T> If you use `require.context`, webpack will watch your entire directory. You will need to ignore files and/or directories so that unwanted changes will not trigger a rebuild.
+
 
 ## `watchOptions.poll`