Azure Policy Guest Configuration for Linux

According to this documentation - https://docs.microsoft.com/en-us/azure/governance/policy/how-to/guest-configuration-create#author-a-configuration, for Linux, it requires to create custom DSC resource module using PowerShell classes. 

Is there any documentation or reference module available on creation of custom DSCresource module for Linux on DSC Package resource and DSC script resource that can be used to install application through guest configuration.