Add Dockerfile

[rkoeninger]

• Add a Dockerfile to the repo root that copy Linux SBCL build into container.
  • Can be based on small alpine image
  • Can host different image for each release of each port
  • Could also just refer to shen-cl build as shen as that's the most widely used one
  • Just shen-cl for now?
• Make shen organization on DockerHub, name is still available

Publicly hosted docker image would allow one to start working with Shen by running:

docker run -it --rm shen/shen:latest

[tizoc]

Maybe an image based on alpine would be a better option in terms of size.

[rkoeninger]

Oh, I assumed centos was one of the smaller ones. Alpine is much smaller.

[tizoc]

Yes, and if you do a multi-staged build the resulting image should be not much bigger than the resulting Shen execultable.

[tizoc]

This one looks like a good base, uses Alpine: https://github.com/eshamster/docker-cl-base