[Message] RESOPS18 set up base project for messages service

[TobySMurray]

Description

This is the base of the backend Message service

Closes #18

How to Test

docker-compose up --build

curl localhost:8211/api/message
# Should return "Hello World"

Checklist

• [x] The code includes tests if relevant
• [x] I have actually self-reviewed my changes and done QA