Add fontawesome

Gemfile

@@ -9,6 +9,7 @@ end
 gem 'bootstrap', '~> 4.0.0.alpha6'
 gem 'coffee-rails', '~> 4.2'
 gem 'devise'
+gem 'font-awesome-rails'
 gem 'jbuilder', '~> 2.5'
 gem 'jquery-rails'
 gem 'pg', '~> 0.18'
@@ -20,6 +21,7 @@ gem 'simple_form'
 gem 'slim-rails'
 gem 'turbolinks', '~> 5'
 gem 'uglifier', '>= 1.3.0'
+
 group :development, :test do
   gem 'byebug', platform: :mri
   gem 'factory_girl_rails'

Gemfile.lock

@@ -99,6 +99,8 @@ GEM
     faker (1.7.2)
       i18n (~> 0.5)
     ffi (1.9.17)
+    font-awesome-rails (4.7.0.1)
+      railties (>= 3.2, < 5.1)
     formatador (0.2.5)
     globalid (0.3.7)
       activesupport (>= 4.1.0)
@@ -316,6 +318,7 @@ DEPENDENCIES
   devise
   factory_girl_rails
   faker
+  font-awesome-rails
   guard-rspec
   jbuilder (~> 2.5)
   jquery-rails

app/assets/stylesheets/application.sass

@@ -0,0 +1,4 @@
+@import "bootstrap"
+@import "font-awesome"
+@import "notifications"
+@import "rooms"