Dockerize the bot!

[cryptoeax]

So many people have had installation issues with the bot that it's time to provide a simple way to run the bot using Docker. It also allows us much more flexibility for future development. I have a branch that implements most of this here: https://github.com/cryptoeax/arbbot/tree/dockerization

It mostly works, except that:

• I need to implement a way to import existing data from the bot, and document where the data is stored.
• I can't get connected to the web UI for the life of me, so I haven't tested that part. Help with that part of it is appreciated. I'm probably making a mistake somewhere...

[cryptoeax]

Status update: on the current dockerization branch the bot and the UI works, and the bot serves its UI on localhost.