rails initializer for heroku

heroku.rb

# frozen_string_literal: true

run "heroku create #{@app_name}"

gem "pg"
file "config/database.yml", <<~CODE
  development: &psql
    adapter: postgresql
    database: #{@app_name}
    pool: 5
    username: postgres
    password:
    host: localhost

  test:
    <<: *psql
    database: #{@app_name}_test

  production:
    <<: *psql
    database: #{@app_name}_prod
CODE

run "heroku addons:add sendgrid:starter"
initializer "mail.rb", <<~CODE
  ActionMailer::Base.smtp_settings = {
    :address        => 'smtp.sendgrid.net',
    :port           => '587',
    :authentication => :plain,
    :user_name      => ENV['SENDGRID_USERNAME'],
    :password       => ENV['SENDGRID_PASSWORD'],
    :domain         => 'heroku.com'
  }
  ActionMailer::Base.delivery_method = :smtp
CODE

git add: "."
git commit: "-a -m 'heroku'"

git push heroku master
heroku run rake db: migrate