Update README.md (#1)

* Update README.md

* Update README.md

README.md

@@ -34,7 +34,7 @@ Or install it yourself as:
 $ gem install activeinsights
 ```
 
-And then install migrations:
+and then install migrations:
 ```bash
 bin/rails g active_insights:install
 bin/rails rails db:migrate
@@ -58,6 +58,12 @@ You can supply an array of ignored endpoints
 config.active_insights.ignored_endpoints = ["Rails::HealthController#show"]
 ```
 
+IF you are using sproket add application.css to your manifest.js (not needed for propshaft):
+```bash
+# app/assets/config/manifest.js
+//= link active_insights/application.css
+```
+
 ## Development
 
 After checking out the repo, run `bin/setup` to install dependencies. Then, run