Add font-awesome-sass gem

Now can use all icons from https://fontawesome.com.

Gemfile

@@ -19,6 +19,7 @@ gem "delayed_job_active_record", "~> 4.1.3"
 gem "devise", "~> 4.7.1"
 gem "devise-async", "~> 1.0.0"
 gem "devise_security_extension", git: "https://github.com/phatworx/devise_security_extension.git" #, "~> 0.10"
+gem "font-awesome-sass", "~> 5.8.1"
 gem "foundation-rails", "~> 6.4.3.0"
 gem "foundation_rails_helper", "~> 3.0.0"
 gem "globalize", "~> 5.2.0"

Gemfile.lock

@@ -227,6 +227,8 @@ GEM
     faraday (0.12.2)
       multipart-post (>= 1.2, < 3)
     ffi (1.11.1)
+    font-awesome-sass (5.8.1)
+      sassc (>= 1.11)
     foundation-rails (6.4.3.0)
       railties (>= 3.1.0)
       sass (>= 3.3.0, < 3.5)
@@ -616,6 +618,7 @@ DEPENDENCIES
   erb_lint
   factory_bot_rails (~> 4.8.2)
   faker (~> 1.8.7)
+  font-awesome-sass (~> 5.8.1)
   foundation-rails (~> 6.4.3.0)
   foundation_rails_helper (~> 3.0.0)
   globalize (~> 5.2.0)

app/assets/stylesheets/application.scss

@@ -1,6 +1,8 @@
 @import "social-share-button";
 @import "foundation_and_overrides";
 @import "fonts";
+@import "font-awesome-sprockets";
+@import "font-awesome";
 @import "icons";
 @import "mixins";
 @import "admin";