Allow configurable base path for Aerie UI

[parkerabercrombie]

Checked for duplicates

Yes - I've already checked

Alternatives considered

Yes - and alternatives don't suffice

Related problems

Deploying the Aerie UI to a non-standard path (e.g., /aerie) requires modifying the code and rebuilding the image.

Describe the feature request

I need or want [...]We need to host Aerie at a /aerie base path (i.e., https://ourhost/aerie). In order to make the Aerie UI work with the /aerie base path we have to modify svelte.js to hack in the desired base path, and then rebuld the UI package:

 sed -i "s#base: \'\'#base: \'/${BASE_PATH}\'#g" svelte.config.js

It would be really nice if this could be configurable without a full rebuild.Right now we have a whole Jenkins pipeline setup just to get around this limitation.

[camargo]

Noting for completeness the workaround is documented here. It seems the Svelte Kit issue blocking this has been closed. I'll take a look next week to see if this is still a limitation.

[camargo]

Just an update here. I did not see an obvious way to do this so I put in a question to the SK team: sveltejs/kit#10147, will update here with findings.