Adde urls for app

instances/urls.py

@@ -0,0 +1,8 @@
+from django.conf.urls import url
+from . import views
+
+urlpatterns =[
+    url(r'^(\d+)/([\w\-\.]+)/$', views.instance, name='instance'),
+    url(r'^statistics/(\d+)/([\w\-\.]+)/$', views.inst_graph, name='inst_graph'),
+    url(r'^status/(\d+)/([\w\-\.]+)/$', views.inst_status, name='inst_status'),
+]