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

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

* 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

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

* 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>

README-en.md

@@ -41,6 +41,8 @@ Timed task management platform supporting Python3, JavaScript, Shell, Typescript
 
 The `latest` image is built on `alpine` and the `debian` image is built on `debian-slim`. If you need to use a dependency that is not supported by `alpine`, it is recommended that you use the `debian` image.
 
+**⚠️ Important**: If you need to run Docker as a **non-root user**, please use the `debian` image. Alpine's `crond` requires root privileges.
+
 ```bash
 docker pull whyour/qinglong:latest
 docker pull whyour/qinglong:debian