add gem

Gemfile.lock

@@ -55,6 +55,10 @@ GEM
       rack (>= 1.0.0)
       rack-test (>= 0.5.4)
       xpath (~> 2.0)
+    carrierwave (1.1.0)
+      activemodel (>= 4.0.0)
+      activesupport (>= 4.0.0)
+      mime-types (>= 1.16)
     childprocess (0.7.1)
       ffi (~> 1.0, >= 1.0.11)
     chronic (0.10.2)
@@ -81,6 +85,8 @@ GEM
     ffi (1.9.18)
     figaro (1.1.1)
       thor (~> 0.14)
+    font-awesome-sass (4.7.0)
+      sass (>= 3.2)
     globalid (0.4.0)
       activesupport (>= 4.2.0)
     i18n (0.8.6)
@@ -238,9 +244,11 @@ DEPENDENCIES
   bootstrap4-kaminari-views
   byebug
   capybara (~> 2.13)
+  carrierwave (~> 1.0)
   coffee-rails (~> 4.2)
   devise
   figaro
+  font-awesome-sass (~> 4.7.0)
   jbuilder (~> 2.5)
   kaminari
   listen (>= 3.0.5, < 3.2)