rails server を実行すると長文のエラーがでてしまう（環境構築）

Question

前提・実現したいこと

MacBook ProでRailsの環境構築をしたいのですが、Railsのサーバーが表示できませんソースコードに原因が書かれていると思うのですが、始めたばかりで原因がよくわかりません。

発生している問題・エラーメッセージ

ProgateのRuby on Rails環境構築を見ながら進めたところ、サーバー起動を行う段階で長文のコードが表示され、ブラウザでも「localhost で接続が拒否されました」との表示が出てしまいました。対処法を調べたのですが初心者でよくわからないためご教授お願いいたします。
Ruby 2.7.1
Rails 5.2.4.2

該当のソースコード

ターミナル

$ rails server
Traceback (most recent call last):
61: from bin/rails:3:in <main>' 60: from bin/rails:3:in load'
59: from /Users/fukuoka/Desktop/RailsApp/bin/spring:15:in <top (required)>' 58: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:72:in require'
57: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:72:in require' 56: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/spring-2.1.0/lib/spring/binstub.rb:11:in <top (required)>'
55: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/spring-2.1.0/lib/spring/binstub.rb:11:in load' 54: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/spring-2.1.0/bin/spring:49:in <top (required)>'
53: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/spring-2.1.0/lib/spring/client.rb:30:in run' 52: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/spring-2.1.0/lib/spring/client/command.rb:7:in call'
51: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/spring-2.1.0/lib/spring/client/rails.rb:28:in call' 50: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/spring-2.1.0/lib/spring/client/rails.rb:28:in load'
49: from /Users/fukuoka/Desktop/RailsApp/bin/rails:9:in <top (required)>' 48: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activesupport-5.2.4.2/lib/active_support/dependencies.rb:291:in require'
47: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activesupport-5.2.4.2/lib/active_support/dependencies.rb:257:in load_dependency' 46: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activesupport-5.2.4.2/lib/active_support/dependencies.rb:291:in block in require'
45: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in require' 44: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in require_with_bootsnap_lfi'
43: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in register' 42: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in block in require_with_bootsnap_lfi'
41: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in require' 40: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-5.2.4.2/lib/rails/commands.rb:18:in <main>'
39: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-5.2.4.2/lib/rails/command.rb:46:in invoke' 38: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-5.2.4.2/lib/rails/command/base.rb:69:in perform'
37: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/thor-1.0.1/lib/thor.rb:392:in dispatch' 36: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/thor-1.0.1/lib/thor/invocation.rb:127:in invoke_command'
35: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/thor-1.0.1/lib/thor/command.rb:27:in run' 34: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-5.2.4.2/lib/rails/commands/server/server_command.rb:142:in perform'
33: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-5.2.4.2/lib/rails/commands/server/server_command.rb:142:in tap' 32: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-5.2.4.2/lib/rails/commands/server/server_command.rb:145:in block in perform'
31: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activesupport-5.2.4.2/lib/active_support/dependencies.rb:291:in require' 30: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activesupport-5.2.4.2/lib/active_support/dependencies.rb:257:in load_dependency'
29: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activesupport-5.2.4.2/lib/active_support/dependencies.rb:291:in block in require' 28: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in require'
27: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in require_with_bootsnap_lfi' 26: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in register'
25: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in block in require_with_bootsnap_lfi' 24: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in require'
23: from /Users/fukuoka/Desktop/RailsApp/config/application.rb:7:in <main>' 22: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/2.7.0/bundler.rb:174:in require'
21: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/2.7.0/bundler/runtime.rb:58:in require' 20: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/2.7.0/bundler/runtime.rb:58:in each'
19: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/2.7.0/bundler/runtime.rb:69:in block in require' 18: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/2.7.0/bundler/runtime.rb:69:in each'
17: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/2.7.0/bundler/runtime.rb:74:in block (2 levels) in require' 16: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in require'
15: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in require_with_bootsnap_lfi' 14: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in register'
13: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in block in require_with_bootsnap_lfi' 12: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in require'
11: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/uglifier-4.2.0/lib/uglifier.rb:5:in <main>' 10: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activesupport-5.2.4.2/lib/active_support/dependencies.rb:291:in require'
9: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activesupport-5.2.4.2/lib/active_support/dependencies.rb:257:in load_dependency' 8: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activesupport-5.2.4.2/lib/active_support/dependencies.rb:291:in block in require'
7: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in require' 6: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in require_with_bootsnap_lfi'
5: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in register' 4: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in block in require_with_bootsnap_lfi'
3: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in require' 2: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/execjs-2.7.0/lib/execjs.rb:4:in <main>'
1: from /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/execjs-2.7.0/lib/execjs.rb:5:in <module:ExecJS>' /Users/fukuoka/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/execjs-2.7.0/lib/execjs/runtimes.rb:58:in autodetect': Could not find a JavaScript runtime. See https://github.com/rails/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)

試したこと

ネットで解決方法を調べて $ bundle install などを試しましたが状況が変わらず行き詰まってしまいました。よろしくお願いいたします。

補足情報（FW/ツールのバージョンなど）

MacOS Catalina 10.15.4
Ruby 2.7.1
Rails 5.2.4.2ここにより詳細な情報を記載してください。

Answer 1

Could not find a JavaScript runtime. See https://github.com/rails/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)

と書いてあるエラー文を検索してみると解決につながるかもしれません。

ちなみに、ReiteeeさんのMacbookには、node.jsはインストールされていますでしょうか。

Comments

[Reiteee]

fshunさん、ご回答ありがとうございます。
node.jsはおそらくまだインストールしていないと思うので、早速やってみます。

[Reiteee]

node.jpをインストールしたところ無事に環境構築ができました！ありがとうございました。

[fshun]

よかったです!!