Setting up the configuration files and refactoring

app/core/config.py

@@ -1,36 +1,38 @@
 # app/core/config.py
 
 from functools import lru_cache
-from pydantic_settings import BaseSettings, SettingsConfigDict
+from pydantic import BaseSettings
+from typing import List
 
 
 class Settings(BaseSettings):
-    # App
-    app_name: str = "URL Shortener API"
-    debug: bool = False
+    app_name: str = "URL Shortener"
+    allowed_hosts: List[str] = ["*"]
+    database_url: str
 
-    # Server
+    # Server settings
     host: str = "0.0.0.0"
     port: int = 8000
     base_url: str = "http://localhost:8000"
 
-    # Database
-    database_url: str = "sqlite:///./urls.db"
-
+    # Debug flag
+    debug: bool = True
+    
     # Optional future extensions
-    allowed_hosts: list[str] = ["*"]
     rate_limit_per_minute: int = 60
 
-    model_config = SettingsConfigDict(
-        env_file=".env",
-        env_file_encoding="utf-8",
-        case_sensitive=False,
-        extra="ignore",
-    )
+    class Config:
+        env_file = ".env"
+        env_file_encoding = "utf-8"
+        case_sensitive = False
+        extra = "ignore"
 
-@lru_cache
+
+# Cached singleton-style access
+@lru_cache()
 def get_settings() -> Settings:
     return Settings()
 
-# Singleton-style access
+
+# Global settings instance
 settings = get_settings()