CustomIWMServer/customiwmserver/__main__.py

import uvicorn
import signal

config = uvicorn.Config("customiwmserver.main:app", host="0.0.0.0", port=8001, reload=True)
server = uvicorn.Server(config)

def exit_now(signum, frame):
    global server
    print("STOPPING")
    server.handle_exit(signum, frame)

signal.signal(signal.SIGINT, exit_now)
signal.signal(signal.SIGTERM, exit_now)

if __name__ == "__main__":
    server.run()