add project structure

app/config.py

@@ -0,0 +1,13 @@
+import os
+from dataclasses import dataclass
+
+
+@dataclass(slots=True)
+class Settings:
+    database_url: str = os.getenv("DATABASE_URL", "sqlite:///./data/app.db")
+    host: str = os.getenv("HOST", "0.0.0.0")
+    port: int = int(os.getenv("PORT", "10000"))
+
+
+def get_settings() -> Settings:
+    return Settings()