add fastapi driver, config

nonebot/config.py

@@ -0,0 +1,29 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+from typing import Set, Union
+from ipaddress import IPv4Address
+
+from pydantic import BaseSettings
+
+
+class Env(BaseSettings):
+    environment: str = "prod"
+
+    class Config:
+        env_file = ".env"
+
+
+class Config(BaseSettings):
+    driver: str = "nonebot.drivers.fastapi"
+    host: IPv4Address = IPv4Address("127.0.0.1")
+    port: int = 8080
+    debug: bool = False
+
+    superusers: Set[int] = set()
+    nickname: Union[str, Set[str]] = ""
+
+    custom_config: dict = {}
+
+    class Config:
+        env_file = ".env.prod"