Add read of SSL environment variable for HubAuth

Author: cmd-ntrf

batchspawner/singleuser.py

@@ -1,3 +1,4 @@
+import os
 import sys
 
 from runpy import run_path
@@ -9,6 +10,9 @@
 def main(argv=None):
     port = random_port()
     hub_auth = HubAuth()
+    hub_auth.client_ca = os.environ.get('JUPYTERHUB_SSL_CLIENT_CA', '')
+    hub_auth.certfile = os.environ.get('JUPYTERHUB_SSL_CERTFILE', '')
+    hub_auth.keyfile = os.environ.get('JUPYTERHUB_SSL_KEYFILE', '')
     hub_auth._api_request(method='POST',
                           url=url_path_join(hub_auth.api_url, 'batchspawner'),
                           json={'port' : port})