Environment variables not showing in app Setting window

[SwarleyAUS]

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Describe the bug

Environment variables are able to be set through the Setting window, but after saving, they do not appear if you reopen the Setting window. The variables are confirmed to have been set by running a printenv from the app terminal.

System infomation

 - OS: linux
 - CasaOS Version: 0.3.2
 - Disk Total: 27712 
 - Disk Used: 18766 
 - Sync State: Sync img: true
linuxserver/syncthing:latest,
Sync Key length: 32
 - System Info: [Debian GNU/Linux 11   \l Bit:64 Mem:3775M Core:4 Linux CasaOS 5.10.0-13-amd64 #1 SMP Debian 5.10.106-1 (2022-03-17) x86_64 GNU/Linux]
 - Browser: Chrome 
 - Version: 102.0.0.0

[LinkLeong]

We will deal with the problem as soon as possible