Set up logo icons

[nick-y-ito]

Description

Add the proper favicon and the icon for the mobile's home screen.

Criteria

• [x] Favicon
• [x] The logo image that is displayed as the icon when adding the app to the home screen on mobile. Check on both iPhone and Android devices.
  • [x] iPhone
  • [x] Android

Notes

• You can check if they are working with these websites.
  • https://en.rakko.tools/tools/9/
  • https://www.opengraph.xyz/url/https%3A%2F%2Fnishiki.tech
  • https://realfavicongenerator.net/favicon_checker?protocol=http&site=nishiki.tech