chore: Add Timezone and restart policy for postgres backup docker

[BinaryMuse]

Add TZ/PGTZ environment variables and restart policy for better reliability of the docker backup setup.

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Migrated from atuinsh/docs#62
Original author: @mateuscomh

[greptile-apps]

Greptile Summary

Adds timezone environment variables (TZ and PGTZ) to both postgres and backup containers, plus restart policy for the backup service.

• Good addition of timezone config for consistent backup timestamps
• Added restart: unless-stopped to backup service for reliability
• Critical: Backup service references non-existent postgresql service - should be db
• Issue: HEALTHCHECK_PORT: 5432 is incorrect for the backup container

Important Files Changed

Filename	Overview
docs/docs/self-hosting/docker.md	Added timezone config and restart policy to backup service, but has incorrect service names and healthcheck port

[greptile-apps]

Additional Comments (2)

1. docs/docs/self-hosting/docker.md, line 114 (link)

   logic: The postgres service is named db (line 48), not postgresql.

2. docs/docs/self-hosting/docker.md, line 125 (link)

   logic: The postgres service is named db (line 48), not postgresql.

_{1 file reviewed, 3 comments}

_{Edit Code Review Agent Settings | Greptile}

[greptile-apps]

logic: HEALTHCHECK_PORT should be the backup container's healthcheck port, not the postgres port. Remove this or use a different port (default is 8080 for this image).

[mateuscomh]

Add TZ/PGTZ environment variables and restart policy for better reliability of the docker backup setup.

Migrated from atuinsh/docs#62 Original author: @matheuscmpm

Hello, if you can fix the original author is @mateuscomh

[BinaryMuse]

Oops, not sure how that happened. Fixed.