make media folder root path customisable

3 jobs for master in 7 minutes and 25 seconds
Status Job ID Name Coverage
  Test
passed #58807
mbr
test-sbt

00:03:39

 
  Build
passed #58808
mbr
assembly-sbt

00:01:49

 
  Publish
passed #58809
mbr
build-latest-image

00:01:57