Add a basic website 🌍

[opatry]

• Explain project and goal
• Add some screenshots
• Tech stack, like in repo README
• Link to CV/personal site/LinkedIn
• Link to Play Store like in repo README
• Play Store privacy policy link to this new host
• Setup Firebase hosting or Github pages?
  • Github pages setup requires a public repository, URL would be http://opatry.github.io/tasks-app.
  • Firebase hosting would kinda require to rely on opatry.net subdomain, like https://tasks-app.opatry.net
• How would it be published, where sources would land
  • sources in app repo undo site/ with nanoc?
  • sources in another repo?
  • sources in a branch with no common ancestor?