Add ENV condition for registration without verification

[ParthJadhav]

Pull Request Checklist

• [x] Pull request is based on the develop branch
• [ ] Pull request includes a changelog file. The entry should:
  • Be a short description of your change which makes sense to users. "Fixed a bug that prevented receiving messages from other servers." instead of "Moved X method from EventStore to EventWorkerStore.".
  • Use markdown where necessary, mostly for code blocks.
  • End with either a period (.) or an exclamation mark (!).
  • Start with a capital letter.
  • Feel free to credit yourself, by adding a sentence "Contributed by @github_username." or "Contributed by [Your Name]." to the end of the entry.
• [ ] Pull request includes a sign off
• [x] Code style is correct (run the linters)

[clokep]

I think we're inclined not to accept this as we really don't want to make open registration easy to enable. This tends to lead to spam across the network and should generally not be enabled.

[ParthJadhav]

Hey @clokep , Thanks for the feedback. Although I was adding this to make it easier for Synapse to be hosted as an App on Umbrel App store.

https://github.com/getumbrel/umbrel-apps#2-%EF%B8%8Fpackaging-the-app-for-umbrel

It's already there but it's a really old version.

[clokep]

Although I was adding this to make it easier for Synapse to be hosted as an App on Umbrel App store.

I'm not sure how this makes it easier for hosting there; running with open registration is not a recommended configuration.