Update GemSpec

rubyai.gemspec

@@ -2,21 +2,33 @@ Gem::Specification.new do |s|
   s.name        = "rubyai"
   s.version     = "0.4"
   s.summary     = "A Ruby gem for the OpenAI (GPT-4) API"
-  s.description = "RubyAI is a wrapper for the OpenAI API that allows you to interact with GPT-3 and GPT-4 from within Ruby applications. It provides simple methods for integrating language model capabilities into your Ruby projects."
+  s.description = "RubyAI is a wrapper for the OpenAI API that allows you to interact with GPT-4 within Ruby/Rails applications. It provides simple methods for integrating language model capabilities into your Ruby projects."
   s.homepage    = "https://github.com/alexshapalov/rubyai"
   s.authors     = ["Alex Shapalov"]
   s.license     = "MIT"
 
   s.files = Dir.chdir(File.expand_path(__dir__)) do
-    Dir["{rubyai,lib}/**/*", "rubyai.rb", "LICENSE", "README.md", "CHANGELOG.md"]
+    Dir[
+      "{lib,spec}/**/*",
+      "LICENSE",
+      "README.md",
+      "CHANGELOG.md",
+      "Gemfile",
+      "CODE_OF_CONDUCT.md",
+      "CONTRIBUTING.md",
+      "pull_request_template.md"
+    ].select { |f| File.file?(f) }
   end
 
-  s.require_paths = ["."]
-  s.required_ruby_version = ">= 2.7"
+  # Specify the main file that will be required by default
+  s.require_paths = ["lib"]
+  s.required_ruby_version = ">= 2.6"
 
+  # Dependencies
   s.add_dependency "faraday", "~> 2.0"
   s.add_development_dependency "rspec", "~> 3.10"
 
+  # Metadata information (optional but useful for gem hosts)
   s.metadata = {
     "source_code_uri" => "https://github.com/alexshapalov/rubyai",
     "changelog_uri"   => "https://github.com/alexshapalov/rubyai/CHANGELOG.md",