Dockerize and upgrade ruby

[TimDaub]

Hi @ys.

I really liked your project and would like to use it for something related. I dockerized it, but had to upgrade ruby to make it work.

I'm also not using your Procfile and unicorn config anymore. In fact, I don't even know what that is :D (Picture is relevant - I never did anything in ruby)

Still wanted to share the dockerization part. Maybe you can make use of it.

Edit:

One of the issues I discovered is that dockerfile currently copies all files into the docker build, so they're not refreshed. I'm trying to sort this out...

[ys]

Hey thanks, I will take a look at that!

Procfile is mostly for heroku