Dockerfile and heroku.yml update 1 (should fix error with yml)

3 jobs for master in 3 minutes and 49 seconds (queued for 4 seconds)
Status Name Job ID Coverage
  Compile
passed compile #496089

00:00:05

 
  Test
passed test #496090

00:00:06

 
  Deploy
passed deploy #496091

00:03:37