Fix Pydantic v2 non-annotated attribute error in Settings class

app/core/config.py

@@ -1,6 +1,6 @@
 import os
 from pathlib import Path
-from typing import Optional
+from typing import Optional, ClassVar
 
 from pydantic_settings import BaseSettings
 
@@ -20,7 +20,7 @@ class Settings(BaseSettings):
     ACCESS_TOKEN_EXPIRE_MINUTES: int = 60 * 24 * 8
 
     # Database
-    DB_DIR = Path("/app") / "storage" / "db"
+    DB_DIR: ClassVar[Path] = Path("/app") / "storage" / "db"
     DB_DIR.mkdir(parents=True, exist_ok=True)
     SQLALCHEMY_DATABASE_URL: str = f"sqlite:///{DB_DIR}/db.sqlite"
 
@@ -28,8 +28,9 @@ class Settings(BaseSettings):
     FIRST_SUPERUSER_EMAIL: Optional[str] = os.getenv("FIRST_SUPERUSER_EMAIL")
     FIRST_SUPERUSER_PASSWORD: Optional[str] = os.getenv("FIRST_SUPERUSER_PASSWORD")
 
-    class Config:
-        case_sensitive = True
+    model_config = {
+        "case_sensitive": True
+    }
 
 
 settings = Settings()