Fix handling of the base url to enable the Service Worker

[jtpio]

References

Fixes https://github.com/voila-dashboards/voici/issues/3 Fixes https://github.com/voila-dashboards/voici/issues/40

Code changes

See https://github.com/voila-dashboards/voici/issues/3 for more details and investigation.

TLDR: Voila seems to be updating the page config baseUrl with the one from the resources in the template: https://github.com/voila-dashboards/voila/blob/0f4cc5360ff387eeaf7e647cee712b2ce08d573a/share/jupyter/voila/templates/lab/index.html.j2#L81

{# Set a dummy variable - we just want the side effect of the update. #}
{% set _ = page_config_full.update(baseUrl=resources.base_url, kernelId=kernel_id) %}

• [x] This change adds the base_url to the resources explicitly for now. We should investigate and track in another issue whether this should be needed or not.
• [x] Update the @jupyterlite packages to ^0.1.0.
• [x] Fix handling of the theme URL
• [x] Add a UI test to cover this? The test could read a csv file with pd.read_csv()

User-facing changes

Reading from a file should work in a notebook like in JupyterLite.

https://user-images.githubusercontent.com/591645/231544815-7ebc7f04-9046-4c01-a2eb-f76615b3a77f.mp4

Backwards-incompatible changes

None

[jtpio]

Add a UI test to cover this? The test could read a csv file with pd.read_csv()

The existing voici.ipynb example notebook has been updated to read the CSV file directly instead of generating a DataFrame. But happy to create a separate notebook if needed: