Changes have been done only for verx stack so far - https://github.com/eclipse/che-dockerfiles/pull/70

[11:15 AM] Ilya Buziuk: from what I understand from https://github.com/eclipse/che/blob/master/wsagent/agent/src/main/resources/org.eclipse.che.ws-agent.json
[11:15 AM] Ilya Buziuk: 1. it creates projects dir
[11:16 AM] Ilya Buziuk: 2. it installs jdk if it is not installed
[11:16 AM] Ilya Buziuk: (for vertex stack it is istalled as I can see)
[11:17 AM] Ilya Buziuk: 3. it install some util packages like tar / curl
[11:17 AM] Ilya Buziuk: sudo is used only for projects dir and package installation

If stack docker image has tar, curl, installed JDK 1.8 and set JAVA_HOME, everything is OK