Upgrade Puma Server && cleanup Gemfile

Gemfile

@@ -22,7 +22,9 @@ gem 'jquery-rails'
 gem 'mini_magick', '>= 4.9.4'
 gem 'pg'
 gem 'rails', '7.0.2.3'
+
 # Replace outdated sass-rails gem with cssbundling-rails for 6.0
+gem 'cssbundling-rails', '~> 1.1'
 
 # Use Uglifier as compressor for JavaScript assets
 # Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
@@ -54,14 +56,11 @@ end
 
 group :production do
   gem 'aws-sdk-s3', require: false
-  gem 'puma', '~> 4.3'
-  gem 'puma-heroku', '~> 1.1.0'
+  gem 'puma', '~> 5.6.4'
   gem 'rails_12factor'
 end
 
 group :doc do
   # bundle exec rake doc:rails generates the API under doc/api.
   gem 'sdoc', require: false
 end
-
-gem 'cssbundling-rails', '~> 1.1'

Gemfile.lock

@@ -246,10 +246,8 @@ GEM
       coderay (~> 1.1)
       method_source (~> 1.0)
     public_suffix (4.0.6)
-    puma (4.3.12)
+    puma (5.6.4)
       nio4r (~> 2.0)
-    puma-heroku (1.1.0)
-      puma (>= 3.0, < 5.0)
     racc (1.6.0)
     rack (2.2.3)
     rack-test (1.1.0)
@@ -410,8 +408,7 @@ DEPENDENCIES
   mini_magick (>= 4.9.4)
   pg
   pry
-  puma (~> 4.3)
-  puma-heroku (~> 1.1.0)
+  puma (~> 5.6.4)
   railroady
   rails (= 7.0.2.3)
   rails-controller-testing