* chat-with-us.md is the current homepage
* -s, --standalone, includes <meta charset="utf-8" />
* but then the default is also <title>Untitled</title>
* alternatively, from pandoc v2.8, --shift-heading-level-by=-1
* fix suggestion to Public Domain rather than Share Alike
* abandon REUSE complexity, but keep SPDX header
* pretty sure it's ok to remove CopyrightText for CC0, was already wrong