[Lerc]

HTTPS isn't an issue, dropping whatever the command generates onto a HTTPS supporting server isn't an issue.

I want the manifest to be automatically generated from whatever is in the directory. The service worker should download everything from the manifest at first launch. I'm ok with a download-on-demand build option, but by default it should grab everything needed. If a user installs something, it should be assumed that they can use it offline.

I feel like the tool should already exist. If it does not yet exist, it seems like there must be a reason for that that I am not aware of.