Change examples to not rely on docker import

[ahellander]

Is your feature request related to a problem? Please describe.

The quickstart examples could be further streamlined and simplified. The compose structure with the override, although elegant, is a bit hard to understand for users not well versed with docker. Also, we do not want the entrypoint to depend on docker for some deployments.

If we implement this, we need to remember to update the CI test workflows accordingly

Describe the solution you'd like A simplified example where a fixed number of clients are started "manually" by the docker-compose file associated with each of the examples.

How would the solution positively affect the functionality? It will become a bit easier to understand for users with less docker experience.

Describe any drawbacks (if any) It will become a less flexible wrt to testing with many clients automatically.

Contact Details An e-mail address in case we need to contact you for further details regarding this request.