heroku config:set DATABASE_URL="mysql2://meuusuariodobaco:minhasenha@link_para_o_banco_de_dados?reconnect=true"

2016-10-03T16:53:38.782809+00:00 heroku[router]: at=error code=H12
desc="Request timeout" method=GET path="/favicon.ico"
host=bsbmusical.herokuapp.com request_id=78eae28a-04a9-4680-a49c-22e709c9dd18
fwd="189.6.126.19" dyno=web.1 connect=1ms service=30000ms status=503 bytes=0

production:
  <<: *default
  adapter: mysql2
  encoding: utf8
  pool: 5
  username: meuUsuario
  password: minhaSenha
  host: meuHost
  port: portaDoBanco