Julea Development Docker

[JBenda]

Add a docker image to ease development with JULEA.

The image allows setting up a local container, which then can be used to

• run JULEA code in an encapsulated system
• run JULEA server with connection to host system

The advantages are, but not only:

• no need to build Spack-Dependencies
• more uniform environment
• less pollution of own system
• re-starting container is the same effort as calling ./scirpts/enviroment

In addition, a workflow was added which builds the container when pushed to master, or a pr is merged in to master and one of the Docker defining files has changed. An example of the provided image can be seen at https://github.com/JBenda/julea/pkgs/container/julea-dev.

Further documentation can be found in doc/Docker.md

[michaelkuhn]

Merged in 98698b6b789cfe9cd69629f7213a95a8dcf951dd and cab3444f0d129db5982b77dadeec52b7e6c5e0ce. I have removed the Spack and CI parts for now to avoid building too much. Thanks!