railtie.rb

# encoding: utf-8
require 'rails/railtie'

module Development
  module Environment
    class Railtie < ::Rails::Railtie
      config.before_initialize do
        env_path = File.expand_path("../../.env", __FILE__)
        if File.exist?(env_path)
          File.open(env_path) do |file|
            file.each do |line|
              variable, value = line.split('=')
              ENV[variable] = value.chomp
            end
          end
        end
      end
    end
  end
end