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docs: clarify/strengthen wording of PG deployment requirements (#14294)

* clarify/strengthen PG wording

* 2

* oops

* Update requirements.md

---------

Co-authored-by: Mert <101130780+mertalev@users.noreply.github.com>
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@ -23,15 +23,21 @@ Immich requires the command `docker compose` - the similarly named `docker-compo
- **RAM**: Minimum 4GB, recommended 6GB.
- **CPU**: Minimum 2 cores, recommended 4 cores.
- **Storage**: Recommended Unix-compatible filesystem (EXT4, ZFS, APFS, etc.) with support for user/group ownership and permissions.
- This can present an issue for Windows users. See below for details and an alternative setup.
- The generation of thumbnails and transcoded video can increase the size of the photo library by 10-20% on average.
- Network shares are supported for the storage of image and video assets only. It is not recommended to use a network share for your database location due to performance and possible data loss issues.
:::tip
Good performance and a stable connection to the Postgres database is critical to a smooth Immich experience.
The Postgres database files are typically between 1-3 GB in size.
For this reason, the Postgres database (`DB_DATA_LOCATION`) should ideally use local SSD storage, and never a network share of any kind.
Additionally, if Docker resource limits are used, the Postgres database requires at least 2GB of RAM.
Windows users may run into issues with non-Unix-compatible filesystems, see below for more details.
:::
### Special requirements for Windows users
<details>
<summary>Database storage on Windows systems</summary>
The Immich Postgres database (`DB_DATA_LOCATION`) must be located on a filesystem that supports user/group
ownership and permissions (EXT2/3/4, ZFS, APFS, BTRFS, XFS, etc.). It will not work on any filesystem formatted in NTFS or ex/FAT/32.
It will not work in WSL (Windows Subsystem for Linux) when using a mounted host directory (commonly under `/mnt`).