How can I run Play framework in HTTPS only in the dev mode?

sbt run -Dhttps.port=9443 -Dhttp.port=disabled

One way to do it is to have two confs file: application.conf and prod.conf

application.conf stays the way it is and prod.conf would look something like

include "application.conf"
https.port = myProdPort

### other params to be overwritten

when launching your application in prod you can do

play run -Dconfig.file=/mypath/prod.conf