Document how to use the python client with a self-hosted freerouting API

[kornpow]

I am running the freerouting API in a docker container. I don't see any place for creating an API key for the container. However when I use the Python library to try and connect to my API, I get an error related to api keys:

# Cannot set the API key to none
 client = FreeroutingClient( base_url="http://localhost:37864", version="dev",api_key=None)

#    ValueError: API key must be provided


# Cannot not specify the API key
client = FreeroutingClient( base_url="http://localhost:37864", version="dev")

# TypeError: FreeroutingClient.__init__() missing 1 required positional argument: 'api_key'

As a sanity check as well, I am definitely running the API at that port:

$ curl http://localhost:37864/v1/system/status
{
  "status": "OK",
  "cpu_load": 2.3054999620327306,
  "ram_used": 18,
  "ram_available": 35,
  "storage_available": -411,
  "session_count": 0
}%