docs: add missing migration steps (#2376)

docs/getting-started/third-parties/index.mdx

@@ -7,5 +7,9 @@ import DocCardList from '@theme/DocCardList';
 Third-party installation methods are maintained by the community. The Seerr team is not responsible for these packages.
 :::
 
+:::info
+Want to add a third-party installation method? Contributions are welcome! Feel free to open a pull request.
+:::
+
 
 <DocCardList />

docs/getting-started/third-parties/nixpkg.mdx

@@ -10,8 +10,21 @@ import Tabs from '@theme/Tabs';
 import TabItem from '@theme/TabItem';
 
 # Nix Package Manager
+:::danger
+This method has not yet been updated for Seerr and is currently a work in progress.
+You can follow the ongoing work on these pull requests:
+  - https://github.com/NixOS/nixpkgs/pull/450096
+  - https://github.com/NixOS/nixpkgs/pull/450093
+:::
+
+<!--
 :::warning
 Third-party installation methods are maintained by the community. The Seerr team is not responsible for these packages.
 :::
 
+:::warning
+This method is not recommended for most users. It is intended for advanced users who are using NixOS distribution.
+:::
+
 Refer to [NixOS documentation](https://search.nixos.org/options?channel=25.05&query=seerr)
+-->

docs/getting-started/third-parties/truenas.mdx

@@ -0,0 +1,20 @@
+---
+title: TrueNAS (Advanced)
+description: Install Seerr using TrueNAS
+sidebar_position: 4
+---
+# TrueNAS
+:::danger
+This method has not yet been updated for Seerr and is currently a work in progress.
+You can follow the ongoing work on this issue https://github.com/truenas/apps/issues/3374.
+:::
+
+<!--
+:::warning
+Third-party installation methods are maintained by the community. The Seerr team is not responsible for these packages.
+:::
+
+:::warning
+This method is not recommended for most users. It is intended for advanced users who are using TrueNAS distribution.
+:::
+-->

docs/getting-started/third-parties/unraid.mdx

@@ -5,6 +5,12 @@ sidebar_position: 3
 ---
 
 # Unraid
+:::danger
+This method has not yet been updated for Seerr and is awaiting a community contribution.
+Feel free to open a pull request on GitHub to update this installation method.
+:::
+
+<!--
 :::warning
 Third-party installation methods are maintained by the community. The Seerr team is not responsible for these packages.
 :::
@@ -18,3 +24,4 @@ This method is not recommended for most users. It is intended for advanced users
 3. Click the **Install Button**.
 4. On the following **Add Container** screen, make changes to the **Host Port** and **Host Path 1** \(Appdata\) as needed.
 5. Click apply and access "Seerr" at your `<ServerIP:HostPort>` in a web browser.
+-->