install.md contains hints for rootless setup on arch linux
related to issue
including pointer to new section in README.md provided by
sudo pacman -S podman
```
+If you have problems when running podman in [rootless](README.md#rootless) mode follow [these instructions](https://wiki.archlinux.org/index.php/Linux_Containers#Enable_support_to_run_unprivileged_containers_(optional))
+
#### [Fedora](https://www.fedoraproject.org), [CentOS](https://www.centos.org)
```bash
