oidc signup only - improved defaults

[wheez]

Hey everyone,

I was trying to enable signup only via oidc. By doing so I found out that Documenso has these two variables:

NEXT_PRIVATE_OIDC_ALLOW_SIGNUP

NEXT_PRIVATE_OIDC_SKIP_VERIFY

I think it would be great to add them to the cloudron docs and I also think enabling them is a better default if cloudron oidc is enabled.

[wheez]

I also tested them already and they work when just added to the env file.
Source: https://github.com/documenso/documenso/pull/1208

[girish]

@wheez good idea, I have fixed up the package.