If the site config.toml file sets generate_rss = true, then Zola will
generate an rss.xml page for the site, which will live at base_url/rss.xml. To
generate the rss.xml page, Zola will look for an rss.xml file in the templates
directory or, if one does not exist, it will use the use the built-in rss template.
Only pages with a date will be available.
The RSS template gets three variables in addition to config:
feed_url: the full url to that specific feedlast_build_date: the date of the latest postpages: see page variables for a detailed description of what this contains