rubocop.yml for new rails project

.rubocop.yml

AllCops:
  Exclude:
    - 'vendor/**/*'
    - 'db/seeds.rb'
    - 'db/seeds/**/*'
    - 'db/schema.rb'
    - 'db/migrate/**/*'
    - 'node_modules/**/*'
    - 'config/initializers/**/*'
    - 'bin/**/*'
    - !ruby/regexp /old_and_unused\.rb$/
  TargetRubyVersion: 2.7
  TargetRailsVersion: 6.0
AsciiComments:
  Enabled: false
Style/Documentation:
  Enabled: false
Layout/LineLength:
  AutoCorrect: true
  Max: 100
  IgnoredPatterns: ['\A#'] # Ignore comment line.
Metrics/BlockLength:
  AutoCorrect: true
  Max: 100
Metrics/MethodLength:
  AutoCorrect: true
  Max: 20
Metrics/ModuleLength:
  Max: 180