feat: add dockerfile for backend and add health endpoint

[gatheluck]

Issue URL

6

Change overview

• Add Dockerfile.backend
  • I temporally use python 3.10. But we will discuss python version in this project in #11.
• Add docker-compose.yaml for build (sorry this should be done in #4 but I implemented backend part).
• Install backend dependencies
  • fastapi
  • uvicorn
  • gunicorn
  • pydantic
• Add a make command to run backend.

How to test

1. Run backend application

% cd environments/cpu
% sudo docker compose up -d
% sudo docker compose exec backend bash

# enter the backend container
$ poetry install
$ make run-backend

poetry run gunicorn 'src.app:main' -k uvicorn.workers.UvicornWorker -b 0.0.0.0:8000 -t 60 --log-level info 
[2023-04-26 16:06:13 +0000] [114] [INFO] Starting gunicorn 20.1.0
[2023-04-26 16:06:13 +0000] [114] [INFO] Listening at: http://0.0.0.0:8000 (114)
[2023-04-26 16:06:13 +0000] [114] [INFO] Using worker: uvicorn.workers.UvicornWorker
[2023-04-26 16:06:13 +0000] [117] [INFO] Booting worker with pid: 117
[2023-04-26 16:06:14 +0000] [117] [WARNING] ASGI app factory detected. Using it, but please consider setting the --factory flag explicitly.
[2023-04-26 16:06:14 +0000] [117] [INFO] Started server process [117]
[2023-04-26 16:06:14 +0000] [117] [INFO] Waiting for application startup.
[2023-04-26 16:06:14 +0000] [117] [INFO] Application startup complete.

2. Visit http://localhost:8000/docs. You will see the page like following. You can also try health endpoint by pushing "Try it out" button and "Execute" button.

3. After test please don't forget to stop or down containers.

% cd environments/cpu
% sudo docker compose stop

Note for reviewers

NA