[Recommend] RESOPS11 - add files for recommender base project

[TobySMurray]

Description

Adds starter files for the Recommender service

Closes #11

How to Test

docker-compose up --build

curl localhost:8222/api/recommender
# Should return "Hello World"

Checklist

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