How to easily edit my site remotely?

Development
4

Ok, I ran all the commands and my PowerShell is telling me:

» Watching for changes in C:/Users/User/Documents/SiteStuff/discourse-air-theme...
  Please add the following to your Gemfile to avoid polling for changes:
    gem 'wdm', '>= 0.1.0' if Gem.win_platform?

So I guess I did it, right? So, my main question now is: Do I have to keep PowerShell open for it to monitor those changes? If so, can I somehow make a Docker container for this to run in on my Windows PC? Also, where even is my gem file so I can add that gem 'wdm', '>= 0.1.0' if Gem.win_platform? line to it?

Ok, so I found some Gemspec source files at:
C:\Users\User.local\share\gem\specs\index.rubygems.org%443\quick\Marshal.4.8
But when I open them in Notepad or Visual Studio Code, they’re foreign characters (gibberish). Maybe these aren’t the right files?

EDIT: Ok, found some more here:
C:\Ruby33-x64\lib\ruby\gems\3.3.0\gems\discourse_theme-2.1.0
I do see a Gemfile that says:

# frozen_string_literal: true
source "https://rubygems.org"

git_source(:github) { |repo_name| "https://github.com/#{repo_name}" }

# Specify your gem's dependencies in discourse_theme.gemspec
gemspec

Do I put it here somewhere? There’s also a “discourse_theme.gemspec” file that isn’t gibberish, that has this in it:

# frozen_string_literal: true

lib = File.expand_path("../lib", __FILE__)
$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
require "discourse_theme/version"

Gem::Specification.new do |spec|
  spec.name = "discourse_theme"
  spec.version = DiscourseTheme::VERSION
  spec.authors = ["Sam Saffron"]
  spec.email = ["sam.saffron@gmail.com"]

  spec.summary = "CLI helper for creating Discourse themes"
  spec.description = "CLI helper for creating Discourse themes"
  spec.homepage = "https://github.com/discourse/discourse_theme"
  spec.license = "MIT"

  spec.files = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }

  spec.bindir = "bin"
  spec.executables = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
  spec.require_paths = ["lib"]

  spec.required_ruby_version = ">= 3.0.0"

  spec.add_runtime_dependency "minitar", "~> 0.6"
  spec.add_runtime_dependency "listen", "~> 3.1"
  spec.add_runtime_dependency "multipart-post", "~> 2.0"
  spec.add_runtime_dependency "tty-prompt", "~> 0.18"
  spec.add_runtime_dependency "rubyzip", "~> 2.3"
  spec.add_runtime_dependency "selenium-webdriver", "> 4.11"

  spec.add_development_dependency "bundler"
  spec.add_development_dependency "rake"
  spec.add_development_dependency "minitest"
  spec.add_development_dependency "guard"
  spec.add_development_dependency "guard-minitest"
  spec.add_development_dependency "webmock"
  spec.add_development_dependency "rubocop-discourse", "~> 3.6.0"
  spec.add_development_dependency "m"
  spec.add_development_dependency "syntax_tree"
  spec.add_development_dependency "mocha"
end

Is it this? I just need to know where to put gem 'wdm', '>= 0.1.0' if Gem.win_platform?