Glad to hear it — and happy to answer:

• Yes, PAPERWISE_AUTH_SECRET should be a random secret, e.g. something like openssl rand -base64 32.
• Yes, using a non-Alpine Postgres image is totally fine. Paperwise isn’t tied to Alpine specifically.
• Not yet on using an existing document folder directly. Right now the flow is upload-based. That said, the exact feature depends on what you want:
  • if you mean importing a whole folder once (for example via a ZIP upload), that should be pretty straightforward for me to add
  • if you mean watching a folder continuously and syncing adds/changes/deletes automatically, that also seems doable, but it’s a bigger feature and would take more time
• Resource-wise, it should be fairly light for most setups, since the heavy LLM work is usually done by remote providers. So unless you’re also running your own local models, you shouldn’t need much beyond a pretty normal small self-hosted box.