Add STATICFILES_DIRS to usage in production

Author: rvlb

README.md

@@ -154,7 +154,16 @@ python manage.py runserver
 > ⚠️ You can also check [this example](https://github.com/django-webpack/django-webpack-loader/tree/master/examples/simple) on how to run a project with `django-webpack-loader` and `webpack-bundle-track`.
 
 ## Usage in production
-We recommend that you keep your local bundles and the stats file outside the version control, having a production pipeline that will compile and collect the assets during the deployment phase. To make sure collectstatic collects the webpack outputs, we recommend disabling automatic collectstatic during the deployment and running it manually. Below are the commands that should be run to achieve this (please note this may change from platform to platform):
+We recommend that you keep your local bundles and the stats file outside the version control, having a production pipeline that will compile and collect the assets during the deployment phase. To make sure collectstatic collects the webpack outputs, we recommend disabling automatic collectstatic during the deployment and running it manually.
+
+You must add `STATICFILES_DIRS` to your settings file, pointing to the directory where the static files are located. This will let `collectstatic` know where it should look at:
+```python
+STATICFILES_DIRS = (
+  os.path.join(BASE_DIR, 'assets'),
+)
+```
+
+Below are the commands that should be run to manually collect the static files (please note this may change from platform to platform):
 ```
 npm run build
 python manage.py collectstatic --noinput