assistant-storefront/config/initializers/geocoder.rb

# Geocoding options
# timeout: 3,                 # geocoding service timeout (secs)
# lookup: :nominatim,         # name of geocoding service (symbol)
# ip_lookup: :ipinfo_io,      # name of IP address geocoding service (symbol)
# language: :en,              # ISO-639 language code
# use_https: false,           # use HTTPS for lookup requests? (if supported)
# http_proxy: nil,            # HTTP proxy server (user:pass@host:port)
# https_proxy: nil,           # HTTPS proxy server (user:pass@host:port)
# api_key: nil,               # API key for geocoding service
# cache: nil,                 # cache object (must respond to #[], #[]=, and #del)
# cache_prefix: 'geocoder:',  # prefix (string) to use for all cache keys

# Exceptions that should not be rescued by default
# (if you want to implement custom error handling);
# supports SocketError and Timeout::Error
# always_raise: [],

# Calculation options
# units: :mi,                 # :km for kilometers or :mi for miles
# distances: :linear          # :spherical or :linear

module GeocoderConfiguration
  LOOK_UP_DB = Rails.root.join('vendor/db/GeoLiteCity.mmdb')
end

Geocoder.configure(ip_lookup: :geoip2, geoip2: { file: GeocoderConfiguration::LOOK_UP_DB }) if ENV['IP_LOOKUP_API_KEY'].present?

Rails.application.config.after_initialize do
  Geocoder::SetupService.new.perform
end