feat: new file

backend/app/db.py

@@ -0,0 +1,15 @@
+from __future__ import annotations
+
+from sqlalchemy import create_engine
+from sqlalchemy.engine import Engine
+
+from .settings import settings
+
+
+def get_engine() -> Engine:
+    return create_engine(
+        settings.mysql_url,
+        pool_pre_ping=True,
+        pool_recycle=3600,
+    )
+