in "Create a Butane config file" part, there is a note saying : See "Creating machine configs with Butane" for information about Butane. 
It's hard for users to search relevant content using search box(Indeed, I spent much time to locate the link)。

Suggest adding direct link for this content for user to know about Butane(https://docs.openshift.com/container-platform/4.13/installing/install_config/installing-customizing.html#installation-special-config-butane_installing-customizing)

https://docs.openshift.com/container-platform/4.13/security/container_security/security-container-signature.html#containers-signature-verify-enable_security-container-signature

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