Demo branch

[MimiXav]

Hi Karaf5 team,

I would like to try to use the demo sample with the pet-clinic/spring-boot-app.
I am very interested by this feature, i.e. Using a pure spring-boot application inside the runtime karaf5.
And having the control on it, like karaf 4 and OSGI application. I am not sure than it's the case now, but it's what I undesrstood on
https://www.youtube.com/watch?v=mhqgPXoJXCk
So I am on the DEMO branch, I compile and run the following command:
java -jar demo/pet-clinic/runtime/target/multi-apps-runtime-5.0-SNAPSHOT.jar
Karaf5 runs, BUT exit just after
2023-07-03 11:06:37.222992118 INFO [ org.apache.karaf.boot.service.KarafLifeCycleService start ] : Starting lifecycle service

What I missing on the purpose for this?
I think than this initiative, having karaf (like we know for OSGI application) with pure spring-boot application, it's very interesting

Regards