Add a description text on index page
Is your feature request related to a problem? Please describe
When searching "Powered by Castopod" on google, almost no castopod instance has its description set. According to this https://www.perrill.com/google-change-title-description-search-results/ it seems that google try to know if the description meta tag is an accurate reflection of what your page is really about
Describe the solution you'd like
A "welcome text" could be usefull on the index page of an instance to better describe what this instance is about to everyone, and it may help google to know what is this page about Having the title + a description under it would help