Vaultwarden: Add option to specify key for existing database secret

[DerDaku]

I added an option to specify a secret key other than 'database-url' for the database secret.

[sgissi]

Hi @DerDaku, that looks good! I'll run some quick tests and merge/release on the weekend. Thank you for contributing!

[aschaber1]

Hello @sgissi , any update? A merge & release would be appreciated.

[sgissi]

Sorry for the delay, it has been quite busy :( It is a long weekend, I'll try to release it by Monday.

[aschaber1]

friendly ping :)

[sgissi]

Thanks @aschaber1! Sorry it took incredibly long, I'm catching up now. A new chart should come out soon.