Containerize your microservice using Docker

[itxcrusher]

As a developer
I need to containerize the microservice using Docker
So that I can deploy it consistently across different environments.

Details and Assumptions

* Docker will provide a lightweight and portable way to package the microservice.
* Create a `Dockerfile` for repeatable builds
* Use a `Python:3.9-slim` image as the base
* It must install all of the Python requirements
* It should not run as `root`
* It should use the `gunicorn` wsgi server as an entry point

Acceptance Criteria

gherkin 
Given the source code of the microservice
When I build a Docker container for the microservice
Then the container should be successfully created and runnable.