Docker.
Use aiohttp-devtools for easier development.
Install flake8 and respect its suggestions please.
curl -X POST localhost:8000/v0/basic-combat -d '{"attacker": {"name": "London", "tokens": 9}, "defender": {"name": "Oxford", "tokens": 8}}'
HTTP/1.1 200 OK
Content-Type: application/json; charset=utf-8
Content-Length: 14
Date: Wed, 03 Jun 2020 12:40:32 GMT
Server: Python/3.8 aiohttp/3.6.2
{"result": -1}