Backup Database like PostgreSQL

What problem will this feature address?

When creating a self-composed database, eg. PostgreSQL, it is not possible to create a simple Backup through the backup tab.
The automated backup process is trying to run pg_dump locally inside the container or host, but PostgreSQL requires password authentication and no password has been supplied to the backup utility.
Because the backup interface lets you specify the Database Name and User, but lacks a field for the Password, pg_dump falls back to connecting without credentials and gets rejected (fe_sendauth: no password supplied).

[Sat Aug 29 16:35:09 UTC 2026] ❌ Error: Backup failed
Error: 2026/08/29 16:35:09 NOTICE: Config file "/root/.config/rclone/rclone.conf" not found - using defaults
pg_dump: error: connection to server at "localhost" (::1), port 5432 failed: fe_sendauth: no password supplied

I used obviously the following config for the composed pg database:
POSTGRES_HOST_AUTH_METHOD: "scram-sha-256"
POSTGRES_INITDB_ARGS: "--auth-host=scram-sha-256 --auth-local=scram-sha-256"

Describe the solution you'd like

Input field for the password and port.

Describe alternatives you've considered

At the moment, I am creating a volume backup But this causes the container to stop, which causes downtimes.

Additional context

No response

Will you send a PR to implement it?

Maybe, need help

Start at the backup tab and trace the automated pg_dump invocation described in the issue, including how the configured database name and user are passed through. Add password and port inputs for PostgreSQL backups, then verify that authenticated backups complete without stopping the database container or causing downtime.