Fix build

Gemfile.lock

@@ -74,7 +74,7 @@ GEM
     concurrent-ruby (1.1.5)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
-    crass (1.0.4)
+    crass (1.0.5)
     database_cleaner (1.7.0)
     datetime_picker_rails (0.0.7)
       momentjs-rails (>= 2.8.1)
@@ -134,7 +134,7 @@ GEM
     kgio (2.11.2)
     launchy (2.4.3)
       addressable (~> 2.3)
-    loofah (2.3.0)
+    loofah (2.3.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     method_source (0.9.2)

README.md

@@ -64,6 +64,21 @@ to see your new dashboard in action.
 
 For more detailed instructions or to make it work with Rails API-only applications, please go through the ['Getting Started` guide](https://administrate-prototype.herokuapp.com/getting_started).
 
+If your apps uses Sprockets 4, you'll need to add Administrate's assets to your `manifest.js` file. To do this, add these two lines to the file:
+
+```
+//= link administrate/application.css
+//= link administrate/application.js
+```
+
+Otherwise, your app will show you this error:
+
+```
+Asset `administrate/application.css` was not declared to be precompiled in production.
+Declare links to your assets in `app/assets/config/manifest.js`.
+```
+
+For more information on why this is necessary, see https://www.schneems.com/2017/11/22/self-hosted-config-introducing-the-sprockets-manifestjs
 
 ## Create Additional Dashboards
 

spec/example_app/app/assets/config/manifest.js

@@ -0,0 +1,2 @@
+//= link administrate/application.css
+//= link administrate/application.js