heroku を使ってRailsを公開したいです。

前提・実現したいこと

herokuを使い自作のrailsを公開したいのですがかれこれ3時間くらいエラーと戦っています。
heroku の設定方法については大方自分で調べ他のですが色々なサイトがあってよくわかりません。
そして公開しようと思っても** Build faild** となり公開できません。
そしてgit push heroku master のコマンドを実行しても**２０分経っても３％**くらいしかターミナルに表示されていません。写真などは確かにありますがこんなに遅いのはおかしいと思います。

どうか力を貸してくれたら幸いです。まだプログラミングを初めて2ヶ月の初心者です。
エラーは以下の通りです。

発生している問題・エラーメッセージ

!     Warning: Multiple default buildpacks reported the ability to handle this app. The first buildpack in the list below will be used.
			Detected buildpacks: Ruby,Node.js
			See https://devcenter.heroku.com/articles/buildpacks#buildpack-detect-order
-----> Ruby app detected
-----> Installing bundler 2.0.2
-----> Removing BUNDLED WITH version in the Gemfile.lock
-----> Compiling Ruby/Rails
 !
 !     There was an error parsing your Gemfile, we cannot continue
 !     
 !     [!] There was an error parsing `Gemfile`: syntax error, unexpected end, expecting end-of-input -   end
 !     ^~~. Bundler cannot continue.
 !     
 !     #  from /tmp/build_b21160b71825b7f520f81d8696ae30f8/Gemfile:56
 !     #  -------------------------------------------
 !     #  end
 !     >    end
 !     #  # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
 !     #  -------------------------------------------
 !
 !     Push rejected, failed to compile Ruby app.
 !     Push failed

該当のソースコード

source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby '2.7.1'

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 6.0.3'
# Use sqlite3 as the database for Active Record
  gem 'sqlite3'
# Use Puma as the app server
gem 'puma', '~> 4.1'
# Use SCSS for stylesheets
gem 'sass-rails', '>= 6'
# Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
gem 'webpacker', '~> 4.0'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.7'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 4.0'
# Use Active Model has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use Active Storage variant
# gem 'image_processing', '~> 1.2'

# Reduces boot times through caching; required in config/boot.rb
gem 'bootsnap', '>= 1.4.2', require: false

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]

end

group :development do
  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
  gem 'web-console', '>= 3.3.0'
  gem 'listen', '~> 3.2'
  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'
  gem 'spring-watcher-listen', '~> 2.0.0'
end

group :test do
  # Adds support for Capybara system testing and selenium driver
  gem 'capybara', '>= 2.15'
  gem 'selenium-webdriver'
  # Easy installation and use of web drivers to run system tests with browsers
  gem 'webdrivers'
    gem 'sqlite3'
end

group :production do
  gem 'pg'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
gem "jquery-rails"