S allius/issue378 (#382)

* move home route into web diretory

* add web UI to add-on

* update changelog

* use Blueprints

app/src/web/routes.py

@@ -0,0 +1,9 @@
+from quart import Blueprint
+from quart import Response
+
+web_routes = Blueprint('web_routes', __name__)
+
+
+@web_routes.route('/')
+async def hello():
+    return Response(response="Hello, world")