Regular expression for changing the localhost domain

change_localhost_domain.rb

# in general you should never need to use this in Rails
# since you should use the url helpers
# this is a really helpful post about how to do this elegantly with a concern
# https://andycroll.com/ruby/url-helpers-outside-views-controllers/
def change_localhost_domain(url, new_domain)
  url.gsub(/http:\/\/localhost:3000|http:\/\/127.0.0.1:3000/, new_domain)
end