Add Splitwise clone backend

run.py

@@ -0,0 +1,15 @@
+from granian import Granian
+from granian.constants import Interfaces, Loops
+
+from app.main import app
+
+server = Granian(
+    target=app,
+    address="0.0.0.0",
+    port=8000,
+    interface=Interfaces.ASGI,
+    loop=Loops.uvloop,
+)
+
+if __name__ == "__main__":
+    server.serve()