Refactoring file structure, not tested yet

app/core/config.py

@@ -0,0 +1,36 @@
+# app/core/config.py
+
+from functools import lru_cache
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    # App
+    app_name: str = "URL Shortener API"
+    debug: bool = False
+
+    # Server
+    host: str = "0.0.0.0"
+    port: int = 8000
+    base_url: str = "http://localhost:8000"
+
+    # Database
+    database_url: str = "sqlite:///./urls.db"
+
+    # 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",
+    )
+
+@lru_cache
+def get_settings() -> Settings:
+    return Settings()
+
+# Singleton-style access
+settings = get_settings()