Doc/Website follow-ups

Content

• Add new content to documentation: Document Silkaj usage (#479)
• Improve index/readme/first page
• Store releases announcements into this git repo... (#277)
• Set up mkdocs-rss-plugin
  • Fix warnings about temporary files generated in /tmp for coverage and blog
• Website navigation thinking
• Automatically generate CLI usage with mkdocs-click (Generate man pages (#179))
• rich-codex: Automate terminal screenshot for doc (#468): automatically generate screenshots
• Donation page: to Silkaj and Duniter projects
• Crowdfundings: DeathReaper

Set up new domain name

• Domain name: silkaj.${tld}?
• Choose domain name, rent it
• CNAME to pages.duniter.org
• Adapt NixOS/Nginx conf
  • Set silkaj.duniter.org redirection to new domain