This PR adds a custom 404 HTML page in our documentation layout which allows users to directly start over from the root of our documentation site or to create an issue if they consider the 404 an error.
NOTICE: I didn't add an ADOC version to this PR, as we need to add a YAML header to the top of the HTML file so Jekyll always serves this HTML file for 404s. And IIC this YAML header won't be retained during the ADOC to HTML transformation, if at all accepted by AsciiDoctor in the ADOC source file.
This PR adds a custom 404 HTML page in our documentation layout which allows users to directly start over from the root of our documentation site or to create an issue if they consider the 404 an error.
Mockup
E.g. compare the custom 404 to the current 404