Fix ModuleNotFoundError for pydantic_settings by using standard pydantic

app/core/config.py

@@ -1,10 +1,10 @@
 import os
 from pathlib import Path
 
-from pydantic_settings import BaseSettings
+from pydantic import BaseModel
 
 
-class Settings(BaseSettings):
+class Settings(BaseModel):
     PROJECT_NAME: str = "Notes API"
     API_V1_STR: str = "/api/v1"
 
@@ -20,8 +20,10 @@ class Settings(BaseSettings):
     # CORS
     CORS_ORIGINS: list[str] = ["*"]
 
-    class Config:
-        env_file = ".env"
-        case_sensitive = True
+    model_config = {
+        "env_file": ".env",
+        "case_sensitive": True,
+    }
+
 
 settings = Settings()