Port-an-existing-app-to-OOD.md

@@ -109,6 +109,12 @@ Examples:
 $ scl enable git19 rh-ruby22 -- bin/bundle install --path=vendor/bundle
 ```
 
+#### 6. Perform database migrations
+
+```
+$ scl enable git19 rh-ruby22 -- bin/rake db:migrate RAILS_ENV=development
+```
+
 ## Test Changes
 
 Test to make sure everything's working properly.