vpnmanager/manager/urls.py

from django.urls import path, include

from . import views

urlpatterns = [
    path('', views.index, name='index'),
    path('devices', views.devices, name='devices'),
    path('hosts', views.hosts, name='hosts'),
    path('devices/<int:device_id>', views.editdevice, name='editdevice'),
    path('heartbeat', views.heartbeat, name='heartbeat')
]