move code from app.py into server.py

app/tests/test_web_route.py

@@ -1,6 +1,6 @@
 # test_with_pytest.py
 import pytest
-from app import app
+from server import app
 from web import Web, web
 from async_stream import AsyncStreamClient
 from gen3plus.inverter_g3p import InverterG3P