Can sbt-native-packager package many server applications with generating many start scripts in one deb package?
Packaging multiple applications is possible via sbt sub modules. Aggregate all the projects and you'll end up with a package containing all the application jars.
Multiple entrypoints are currently on the way. You can follow the progress here: https://github.com/sbt/sbt-native-packager/pull/839
Cheers, Muki