My preferred rubocop configuration

.rubocop.yml

require:
  - rubocop-performance
  - rubocop-rails

AllCops:
  Exclude:
    - bin/*
    - db/schema.rb
    - node_modules/**/*
    - vendor/**/*
  NewCops: enable

Layout/LineLength:
  Max: 115

Style/ClassAndModuleChildren:
  Enabled: false

Style/Documentation:
  Enabled: false

Style/FrozenStringLiteralComment:
  Enabled: false

Style/StringLiterals:
  EnforcedStyle: double_quotes

Style/SymbolArray:
  Enabled: true