add dry run mode

3 jobs for master in 3 minutes and 34 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed test-sbt #70493
mbr

00:01:34

 
  Build
passed assembly-sbt #70494
mbr

00:01:31

 
  Publish
passed build-latest-image #70495
mbr

00:00:27