changed all uses of SECRET -> JWT_SECRET

[joelazwar]

Refer to Seneca-CDOT/telescope #2957

[humphd]

Looks good. Let's add a bit more info to the README, since this key has to work for Supabase as well (might as well talk about that, and link to any docs about what the key should look like). Your jest config implies it has to be 32 chars wide? You should mention that in the README.

@joelazwar we're going to have to do a release to get this in Telescope, see #38, which @AmasiaNalbandian wrote (btw, that should be in Telescope, or we'll lose it).

After the release, @rclee91, @JiaHua-Zou and I have found you need to do pnpm install in Telescope to have it pick up the new version and update the lock file (i.e., after npm shows the new version).