There's no official Chrome or Chromium package for Linux don't install it this way because it's either outdated or unofficial, both are bad. Download it from official source.

However, distributing such Ruby apps to inexperienced end users or non-Ruby-programmer end users is problematic. If users have to install Ruby first, or if they have to use RubyGems, they can easily run into problems. Even if they already have Ruby installed, they can still run into problems, e.g. by having the wrong Ruby version installed. The point is, it's a very real problem that could harm your reputation.

That app you desperately need in order to function? We probably have it. The vast software libraries of Ubuntu and Flatpak combine to make all of your tools available in a single location, called the Pop!_Shop.