use image for kubespawner instead of image_spec which is deprecated
@@ -31,7 +31,7 @@ you need to add the following into ``config.yaml``:
def start(self):
if 'image' in self.user_options:
# binder service sets the image spec via user options
- self.image_spec = self.user_options['image']
+ self.image = self.user_options['image']
return super().start()
c.JupyterHub.spawner_class = BinderSpawner
