Add non-root Docker user support with automatic command setup (#2830)

* Initial plan

* Add non-root user guide and improve error messages

Co-authored-by: whyour <22700758+whyour@users.noreply.github.com>

* Add PM2_HOME configuration to fix non-root user permission errors

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* Fix PM2 socket error by using /tmp for PM2_HOME instead of mounted volume

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* Document symlink permission limitation for non-root users

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* Clarify that scheduled tasks auto-adapt to use full paths when symlinks unavailable

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* Add error handling for symlink creation to prevent worker crashes

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* Add practical solutions for non-root users to use ql and task commands

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* Modify linkCommand to create symlinks in ~/bin for non-root users

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* 修复链接 task 命令

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Co-authored-by: whyour <22700758+whyour@users.noreply.github.com>
Co-authored-by: whyour <imwhyour@gmail.com>

docker/docker-entrypoint.sh

@@ -1,5 +1,8 @@
 #!/bin/bash
 
+# Add ~/bin to PATH for non-root users
+export PATH="$HOME/bin:$PATH"
+
 dir_shell=/ql/shell
 . $dir_shell/share.sh