Fix "Render Notebook with Voila" in JupyterHub (#4487)

* Allow serving pages within JupyterHub image
* [images/jupyter-singleuser] Bump version
* Add JH prototype image profile for 2025.11.7

Author: raebot

images/jupyter-singleuser/jupyter_notebook_config.py

@@ -1,3 +1,8 @@
 c.FileCheckpoints.checkpoint_dir = (  # noqa: F821
     "/home/jovyan/.jupyter/.ipynb_checkpoints/"
 )
+c.Spawner.args = [  # noqa: F821
+    "--VoilaConfiguration.enable_nbextensions=True",
+    "--VoilaConfiguration.file_whitelist=['.*']",
+    '--NotebookApp.tornado_settings={"headers":{"Content-Security-Policy": "frame-ancestors \'self\'"}}',
+]

images/jupyter-singleuser/pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "jupyter-singleuser"
-version = "2025.9.25"
+version = "2025.11.7"
 description = "This is the notebook image that individual users are served via JupyterHub."
 requires-python = ">=3.11.0, <3.12.0"
 

kubernetes/apps/charts/jupyterhub/values.yaml

@@ -40,6 +40,17 @@ jupyterhub:
           mem_limit: "12G"
           mem_guarantee: "10G"
           cpu_guarantee: 1.5
+      - display_name: "Prototype Image - 2025.11.7, Python 3.11"
+        description: "This is the newer environment proposed for promotion to default. Recommended for analysts to use and report any issues. Your code will run on a shared machine with 3–10G of memory and 0.7–1.9 CPU cores."
+        kubespawner_override:
+          image: ghcr.io/cal-itp/data-infra/jupyter-singleuser:2025.11.7
+      - display_name: "Power Prototype Image - 2025.11.7, Python 3.11"
+        description: "This is the newer environment proposed for promotion to default. Recommended for analysts to use and report any issues. Your code will run on a shared machine with 10–12G of memory and 1.5–1.9 CPU cores."
+        kubespawner_override:
+          mem_limit: "12G"
+          mem_guarantee: "10G"
+          cpu_guarantee: 1.5
+          image: ghcr.io/cal-itp/data-infra/jupyter-singleuser:2025.11.7
       - display_name: "Legacy Image - 2025.6.10, Python 3.11"
         description: "This is the older environment from before the dependency updates work. Your code will run on a shared machine with 3–10G of memory and 0.7–1.9 CPU cores."
         kubespawner_override: