docs(databases): document enabling Redis AOF persistence

[anilonayy]

Summary

Adds a short recipe to the Databases → Overview page showing how to enable Redis AOF persistence through Advanced → Run Command.

Why

A Dokploy Redis service starts with redis-server --requirepass <password> and no persistence flags, so it runs with Redis' built-in RDB defaults and the append-only file (AOF) is off. There is no dedicated persistence setting in the UI, and the way to turn AOF on (overriding Command/Args) is not documented. On a write-heavy instance this matters: the default RDB snapshotting can rewrite the dump far more often than expected.

What the recipe says

Set, under Advanced → Run Command:

• Command: /bin/sh
• Arguments: -c, then redis-server --requirepass "$REDIS_PASSWORD" --appendonly yes --save 3600 1

then Deploy. It references "$REDIS_PASSWORD" (which Dokploy already injects) instead of hardcoding the password, which also avoids quoting issues with special characters.

Verification

• The default command and the injected REDIS_PASSWORD variable are taken from packages/server/src/utils/databases/redis.ts in the main repo.
• I ran the exact Command/Args this page recommends against the default redis:8 image. CONFIG GET appendonly returns yes, CONFIG GET save returns the configured rule, and auth with the password works.
• Docs-only change (one page, English). I did not run the full docs site build locally. A matching overview.cn.mdx update can follow if wanted.