Dockerfile for the st spot detector

[elhb]

Tested and working 20180720.
Docker version 18.03.1-ce, build 9ee9f40
OSX High Sierra 10.13.5

[jfnavarro]

What are the differences/advantages of the docker container over the singularity container that we already have?

[elhb]

just another platform, some people are more familiar with docker than singularity, more a matter of taste I think (unless you are running on HPC like uppmax, then you'd probably want singularity)

[jfnavarro]

I think it is better that you put the container in a separate repo with installation instructions (as we did with the singularity) and then we can link to it from our README. What do you think @ludvb @elhb ?

[elhb]

sounds good to me

[ludvb]

Thanks for the PR @elhb ! I'm fine with either solution but I guess a symmetrical treatment with the singularity container makes sense. Maybe we should avoid cluttering the org page with container repos, though? As an alternative, we could merge this with the singularity container repo and update its name and readme to reflect that.

[jfnavarro]

Merging the singularity container repo and update the documentation accordingly sounds like a good idea to me.