Consider making Dockerfile

[lskatz]

Hi, I thought I would earmark a request for creating a container for BIGSdb, similar to discussion #474. There are many steps in the installation that require central resources, making it impossible for a non-root user to install the software. I think it would be great to have a container so that individual scripts in BIGSdb could be executed more easily. The biggest example that comes to mind is running MLST or something more comprehensive like cgMLST on a sample.

I tried running the container mentioned in #474 on the command line with Singularity; however I do believe the documentation, that it is meant for docker-compose only. It is difficult to understand which specific scripts should be run for any particular purpose.

repo URL with the container: https://github.com/berlin-mlst/docker-bigsdb