To test this without pushing images to the docker registry,

• build the images but don't create and push the jefftud/… tags
• use the image without jefftud/ prefix when setting up the project via the dashboard
• use --no-pull for docker.sh from the startup kit

Summarizing the changes:

• copy MediSwarm code into Docker image (to have one way of distribution for local training; also used for testing at that location)
• main.py in 3dcnn_ptlapplication code can be run in swarm and local training mode (refactored in methods in new file)
• docker.sh in client startup scripts can run those two and the minimum example as an additional pre-flight check
• documentation in main README.md (maybe to be moved later)

In addition:

• fixed apt package versions and optimized Dockerfiles for nfcore and 3dcnn containers