Attempt III of travis fixes

.travis.yml

@@ -1,12 +1,14 @@
-language: ruby
-rvm:
-  - 2.4.1
+language: node_js
+node_js:
+  - 6.11.0
 before_script:
+  - rvm install 2.4.1
   - cp config/database.travis.yml config/database.yml
   - mkdir -p public/app
   - touch public/app/index.html
   - ./install_frontend.sh
   - bundle exec rake db:create db:migrate
+  - npm install
 script:
   # A 'fake' secret token for use in our CI env.
   # Don't worry- this isn't the real one.