Briefkasten won't install

Apps and Virtualization
1

I’ve been trying to install Briefkasten v1.2.10.

I may be misunderstanding the requirements. In the required fields, it asks for:

  1. NextAuth Secret
  2. Postgres Password
  3. NextAuth URL

Can the secret and password be arbitrary tokens that I create? Or, does the NextAuth secret need to match something I set up in another app (ie. NextAuth)?

The NextAuth URL tooltip suggests that I simply point to the URL where the app will be. But, maybe this can only be set up through NextAuth?

When I click install, I get an error that says the URI for NEXTAUTH_URL is invalid.

Any ideas?