style(rubocop): install rubocop configuration

.gitignore

@@ -30,3 +30,4 @@ vendor/bundle
 Procfile.local
 VERSION
 
+.rubocop-https*

.rubocop.yml

@@ -0,0 +1,35 @@
+inherit_from:
+  - https://dev.k.io/rubocop/rubocop.rails.yml
+
+Style/StringLiterals:
+  EnforcedStyle: double_quotes
+
+Style/WordArray:
+  EnforcedStyle: brackets
+
+Layout/LineLength:
+  Enabled: false
+
+Metrics/AbcSize:
+  Enabled: false
+
+Metrics/BlockLength:
+  Enabled: false
+
+Metrics/ClassLength:
+  Enabled: false
+
+Metrics/CyclomaticComplexity:
+  Enabled: false
+
+Metrics/MethodLength:
+  Enabled: false
+
+Metrics/ModuleLength:
+  Enabled: false
+
+Metrics/PerceivedComplexity:
+  Enabled: false
+
+Lint/MissingSuper:
+  Enabled: false

Gemfile

@@ -47,4 +47,6 @@ group :development do
   gem 'rspec-rails', require: false
   gem "factory_bot_rails", "~> 4.0", require: false
   gem "database_cleaner", require: false
+  gem "rubocop"
+  gem "rubocop-rails"
 end

Gemfile.lock

@@ -55,6 +55,7 @@ GEM
       activerecord (>= 3.2, < 6.0)
       rake (>= 10.4, < 13.0)
     arel (9.0.0)
+    ast (2.4.2)
     authie (3.3.1)
       secure_random_string
     autoprefixer-rails (9.1.3)
@@ -151,6 +152,9 @@ GEM
     nokogiri (1.14.2)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
+    parallel (1.22.1)
+    parser (3.2.1.1)
+      ast (~> 2.4.1)
     puma (6.1.0)
       nio4r (~> 2.0)
     racc (1.6.2)
@@ -181,11 +185,14 @@ GEM
       method_source
       rake (>= 0.8.7)
       thor (>= 0.19.0, < 2.0)
+    rainbow (3.1.1)
     rake (12.3.3)
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
+    regexp_parser (2.7.0)
     resolv (0.2.1)
+    rexml (3.2.5)
     rspec (3.8.0)
       rspec-core (~> 3.8.0)
       rspec-expectations (~> 3.8.0)
@@ -207,6 +214,23 @@ GEM
       rspec-mocks (~> 3.8.0)
       rspec-support (~> 3.8.0)
     rspec-support (3.8.0)
+    rubocop (1.48.1)
+      json (~> 2.3)
+      parallel (~> 1.10)
+      parser (>= 3.2.0.0)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.26.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 2.4.0, < 3.0)
+    rubocop-ast (1.27.0)
+      parser (>= 3.2.1.0)
+    rubocop-rails (2.18.0)
+      activesupport (>= 4.2.0)
+      rack (>= 1.1)
+      rubocop (>= 1.33.0, < 2.0)
+    ruby-progressbar (1.13.0)
     sass (3.5.7)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
@@ -240,6 +264,7 @@ GEM
       thread_safe (~> 0.1)
     uglifier (4.1.18)
       execjs (>= 0.3.0, < 3)
+    unicode-display_width (2.4.2)
     websocket-driver (0.7.5)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
@@ -283,6 +308,8 @@ DEPENDENCIES
   resolv (~> 0.2.1)
   rspec
   rspec-rails
+  rubocop
+  rubocop-rails
   sass-rails (~> 5.0)
   secure_headers
   sentry-raven