Make Installer
The installer should be a packaged version of your application that a user could use to install your software. If your application consists of multiple components that need to be installed separately (e.g. Android AND desktop) then you need to provide installers for each one.
Acceptable forms of packaging include:
Desktop: an exe, dmg or pkg file that installs the application.
Android: an apk file generated from IntelliJ IDEA or Android Studio that can be side-loaded into a virtual device.
Service: a Docker image that contains your service, with instructions on how to run it.