This should be in the .rubocop.yml file in the root of your rails app after installing and configuring rubocop

Ruby Rubocop Style guide

AllCops:
  Exclude:
    - "vendor/**/*"
    - "db/**/*"
    - "tmp/**/*"
    - "bin/**/*"
    - "log/**/*"
    - "config/**/*"
    - "app/assets/**/*"
    - "Rakefile"
    - "spec/cassettes/**/*"
    - "micro-shared/**/*"
    - "Gemfile"
    - "Gemfile.lock"
    - "node_modules/**/*"
  UseCache: false
  TargetRubyVersion: 2.5

#################### Lint ###########################
Lint/AssignmentInCondition:
  Enabled: false
Lint/HandleExceptions:
  Enabled: false
Lint/UnusedBlockArgument:
  Enabled: false
#################### Metric ###########################
Metrics/AbcSize:
  Enabled: false
  Max: 20
Metrics/ClassLength:
  Enabled: false
Metrics/MethodLength:
  Enabled: false
Metrics/LineLength:
  Enabled: false
  Max: 120
Metrics/BlockLength:
  CountComments: false
  Exclude:
    - "spec/**/*"
    - "link_community.gemspec"
  Max: 150
#################### Style ###########################
Style/RegexpLiteral:
  Exclude:
    - Guardfile
Style/FrozenStringLiteralComment:
  Enabled: false
Style/PercentLiteralDelimiters:
  Enabled: true
  PreferredDelimiters:
    "%": "()"
    "%i": "()"
    "%q": "()"
    "%Q": "()"
    "%r": "{}"
    "%s": "()"
    "%w": "()"
    "%W": "()"
    "%x": "()"
Style/WordArray:
  Enabled: false
#################### Layout ###########################
Layout/TrailingBlankLines:
  AutoCorrect: true
Layout/DotPosition:
  Enabled: true
  EnforcedStyle: trailing
  SupportedStyles:
  - leading
  - trailing
Layout/IndentHash:
  Enabled: true
  EnforcedStyle: consistent
Layout/MultilineMethodCallIndentation:
  Enabled: true
  EnforcedStyle: indented
Layout/MultilineAssignmentLayout:
  Enabled: true
  EnforcedStyle: same_line
Layout/AlignParameters:
  Enabled: true
  EnforcedStyle: with_fixed_indentation
Layout/EndAlignment:
  Enabled: true
  EnforcedStyleAlignWith: start_of_line
Layout/CaseIndentation:
  Enabled: true
  EnforcedStyle: end
#################### Naming ###########################
Naming/PredicateName:
  Enabled: true
  NamePrefix:
  - is_
  - has_
  - have_
  NamePrefixBlacklist:
  - is_
  Exclude:
  - spec/**/*