New comment by thegarlynch on void-packages repository

https://github.com/void-linux/void-packages/issues/31566#issuecomment-875793421

Comment:
Ok. i finally get it work. 

```sh
#!/bin/sh

export USER="<<user>>"
export HOME="/home/<<user>>"

exec chpst -u "<<user>>" env XDG_RUNTIME_DIR="/run/user/1000" env DOCKER_HOST="unix:///run/user/1000/docker.sock" env PATH="/home/<<user>>/bin:$PATH" /home/<<user>>/bin/dockerd-rootless.sh
```

also, set /etc/security/pam_env.conf

```
DOCKER_HOST     DEFAULT=unix:///${XDG_RUNTIME_DIR}/docker.sock
PATH            DEFAULT=${HOME}/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin
```

if only runit is able to run a service only after login (with USER and HOME environment being set). i could made a package out of this