Proposal: Windows container support

[joeapearson]

Related proposal in the Erlang image repo: erlang/docker-erlang-otp#360

We a dependency on Windows. It would be very convenient for us to have official Elixir Windows base images from which to build. Has this been considered already and would it be useful for others? As I have said on the Erlang sister issue, this is something we're going to be investigating in house and could wrap up into a PR if desired.

[joeapearson]

We have some very early container builds available here: https://github.com/avid-technology/docker-elixir-windows