tr: write error: Broken pipe` during container startup

[micwic]

Issue: tr: write error: Broken pipe during container startup

Description:
When starting the container osixia/phpldapadmin:latest, the following error appears in the logs:
*** Running /container/run/startup/phpldapadmin...
Set apache2 http config...
Bootstap phpLDAPadmin...
tr: write error: Broken pipe
tr: write error

The error seems to originate from the function get_salt in the startup script. While it does not block the container startup, it causes confusion and may indicate an underlying issue.

Environment:

• OS: Windows 11 / Docker Desktop
• Docker version: 27.3.1
• Image version: osixia/phpldapadmin:latest

Steps to reproduce:

1. Use the default Docker Compose configuration for phpLDAPadmin.
2. Start the container.
3. Observe the logs for the error.

Expected behavior:
The container should start without any errors.