支持自定义端口

config.py

@@ -2,9 +2,12 @@ from dataclasses import dataclass
 from pathlib import Path
 import os
 
+from dotenv import load_dotenv
+
 
 @dataclass(frozen=True, slots=True)
 class Settings:
+    port: int
     api_key: str | None
     base_url: str
     model: str
@@ -13,7 +16,9 @@ class Settings:
 
     @classmethod
     def from_env(cls) -> "Settings":
+        load_dotenv(dotenv_path=Path.cwd() / ".env", override=False)
         return cls(
+            port=int(os.getenv("SERVICE_PORT", "8000")),
             api_key=os.getenv("DEEPSEEK_API_KEY"),
             base_url=os.getenv("DEEPSEEK_BASE_URL", "https://api.deepseek.com"),
             model=os.getenv("DEEPSEEK_MODEL", "deepseek-v4-flash"),