Add support for context path (#313)

* Add support for context path

add an optional environment variable: LD_CONTEXT_PATH

* Fix for pull request code review comments

Co-authored-by: s2marine <s2marine@gmail.com>

siteroot/urls.py

@@ -13,6 +13,7 @@ Including another URLconf
     1. Import the include() function: from django.urls import include, path
     2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
 """
+from django.conf import settings
 from django.contrib.auth import views as auth_views
 from django.urls import path, include
 
@@ -30,6 +31,9 @@ urlpatterns = [
     path('', include('bookmarks.urls')),
 ]
 
+if settings.LD_CONTEXT_PATH:
+    urlpatterns = [path(settings.LD_CONTEXT_PATH, include(urlpatterns))]
+
 if DEBUG:
     import debug_toolbar