Add support for docker arguments

[bdmendes]

Needs to be tested in the server.

[miguelpduarte]

Just some suggestions and questions for debate.

Also, since it seems that the pipeline is not doing this for some reason (I thought I had configured it to do so 🤔), please run shellcheck on the scripts just to make sure everything is fine and paste the results here. Thanks.

[miguelpduarte]

(Nevermind the comment about shellcheck, it seems that I confused myself with the Makefile lol)

[miguelpduarte]

Does not work for multiple docker arguments. I had no issue with this PR only tackling volumes and the next PR making the config more modular to allow for arbitrary docker flags.

However, as it stands, this cannot be merged since it will cause further configuration to break.

We should either fix this to work for multiple arguments or rollback to just configuring volumes.

[miguelpduarte]

xargs seems like it would work here:

We just need to be mindful of spaces, potentially quoting the passed in flags, as necessary -- for example, in case the volumes path has spaces in the filepath: