Harden Vaultwarden installation

[Virviil]

Submit Checklist (REMOVE THIS SECTION BEFORE SUBMITTING)

• I have selected the next branch as the destination for my PR, not main.
• I have listed all changes in the Changes section.
• I have filled out the Issues section with the issue/discussion link(s) (if applicable).
• I have tested my changes.
• I have considered backwards compatibility.
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Changes

• Make Vaultwarden installation to use Postgres as storage, that allows to perform backups using standard Coolify mechanisms.
• Changing logo from licensed Bitwarden to Vaultwarden

Issues

• fix #

[Virviil]

I don't understand how templates/service-templates.json file is created, but I hope that automatically.
It's probably should be changed before merging this PR.

@peaklabs-dev hope you can point me out