working 3 tier approach

backend/app/config.py

@@ -0,0 +1,11 @@
+from pydantic_settings import BaseSettings
+
+
+class Settings(BaseSettings):
+    DATABASE_URL: str = "postgresql+asyncpg://postgres:postgres@localhost:5432/kmountain"
+    CORS_ORIGINS: list[str] = ["http://localhost:4200", "http://localhost:3000"]
+
+    model_config = {"env_prefix": "KMTN_"}
+
+
+settings = Settings()