Support ASGI and WSGI Applications

Version 0.2.0 adds support for ASGI applications so that server-thread can be used with ASGI micro-frameworks like FastAPI

Here is a minimal example with FastAPI:

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def root():
    return {"message": "Howdy!"}


server = ServerThread(app)
requests.get(f"http://{server.host}:{server.port}/").json()

See #3 for another example with FastAPI and tile serving