Create a docker-compose file

[DakshChan]

Is your feature request related to a problem? Please describe.
Docker is a useful tool you will likely want to use for your own personal projects or encounter at your workplace. Docker is used to containerize applications for easy deployment, to provide isolation, and scalability/redundancy.

For the auth bot, we would like to use docker to make it easy to deploy our bot and accompanying database.

Describe the solution you'd like

1. Create a DockerFile to turn our code into an image
2. Create a docker-compose file to deploy 2 services, the auth bot, and a MongoDB database
3. Write code in a new python file (perhaps db.py) to connect to the database

Additional context
Please see https://hub.docker.com/_/mongo to create a mongodb container in a DockerFile