Jupyter config: adjustable image name (#45)

Author: yakutovicha

templates/jupyterhub_config.py

@@ -22,7 +22,7 @@
 # user Docker Spawner
 c.JupyterHub.spawner_class = 'dockerspawner.DockerSpawner'
 # JupyterHub always runs image tagged as "aiidalab-docker-stack:latest" on local docker instance
-c.DockerSpawner.image = "aiidalab-docker-stack:latest"
+c.DockerSpawner.image = "{{ aiidalab_server_image_name }}:{{ aiidalab_server_image_version }}"
 c.DockerSpawner.extra_host_config.update({
     # take care of lost child processes
     # see also: https://github.com/krallin/tini/issues/8