Rails5で動いたコードがRails6で動かなくなった

Rails5.2で動かしていたRails環境がローカルだとエラーになってしまったためRails6に移行しました。
元のheroku
https://rails-docker-portfolio.herokuapp.com/
ログインid sample123
ログインパスワード sample12345
元のgithub
https://github.com/takoyan33/rails-docker

しかし、Rails6で動かすとこのようなエラーが出るようになりました。（その他の部分は動いています。）
掲示板作成部分

そのため、解決法が分かる方がいれば教えて頂きたいです。

Ruby
1docker log
2| Started POST "/boards" for 172.20.0.1 at 2022-02-28 13:33:08 +0000
3rails-docker-2-web-1  | Cannot render console from 172.20.0.1! Allowed networks: 127.0.0.0/127.255.255.255, ::1
4rails-docker-2-web-1  | Processing by BoardsController#create as HTML
5rails-docker-2-web-1  |   Parameters: 
6rails-docker-2-web-1  | {
7rails-docker-2-web-1  |     "authenticity_token" => "[FILTERED]",
8rails-docker-2-web-1  |                  "board" => {
9rails-docker-2-web-1  |           "title" => "サンプル",
10rails-docker-2-web-1  |            "name" => "サンプル",
11rails-docker-2-web-1  |            "body" => "サンプル",
12rails-docker-2-web-1  |         "tag_ids" => [
13rails-docker-2-web-1  |             [0] ""
14rails-docker-2-web-1  |         ]
15rails-docker-2-web-1  |     },
16rails-docker-2-web-1  |                 "commit" => "保存"
17rails-docker-2-web-1  | }
18rails-docker-2-web-1  |   User Load (1.3ms)  
19rails-docker-2-web-1  |         SELECT
20rails-docker-2-web-1  |                 `users`. *
21rails-docker-2-web-1  |         FROM
22rails-docker-2-web-1  |                 `users`
23rails-docker-2-web-1  |         WHERE
24rails-docker-2-web-1  |                 `users`.`id` = 1 LIMIT 1
25rails-docker-2-web-1  |   ↳ app/controllers/application_controller.rb:9:in `current_user'
26rails-docker-2-web-1  | Redirected to http://localhost:3000/boards/new
27rails-docker-2-web-1  | Completed 302 Found in 26ms (ActiveRecord: 3.2ms | Allocations: 24197)
28rails-docker-2-web-1  | 
29rails-docker-2-web-1  | 
30rails-docker-2-web-1  | Started GET "/boards/new" for 172.20.0.1 at 2022-02-28 13:33:08 +0000
31rails-docker-2-web-1  | Cannot render console from 172.20.0.1! Allowed networks: 127.0.0.0/127.255.255.255, ::1
32rails-docker-2-web-1  | Processing by BoardsController#new as HTML
33rails-docker-2-web-1  |   User Load (0.9ms)  
34rails-docker-2-web-1  |         SELECT
35rails-docker-2-web-1  |                 `users`. *
36rails-docker-2-web-1  |         FROM
37rails-docker-2-web-1  |                 `users`
38rails-docker-2-web-1  |         WHERE
39rails-docker-2-web-1  |                 `users`.`id` = 1 LIMIT 1
40rails-docker-2-web-1  |   ↳ app/controllers/application_controller.rb:9:in `current_user'
41rails-docker-2-web-1  |   Rendering layout layouts/application.html.erb
42rails-docker-2-web-1  |   Rendering boards/new.html.erb within layouts/application
43rails-docker-2-web-1  |   Rendered shared/_error_messages.html.erb (Duration: 0.1ms | Allocations: 42)
44rails-docker-2-web-1  |   Tag Load (1.4ms)

Ruby
1#views/boards/_form.html.erb
2<%= render 'shared/error_messages' %>
3<%= form_with model: board do |f| %>
4  <div class="form-group">
5    <%= f.label :title, 'タイトル' %>
6    <%= f.text_field :title, class: 'form-control' %>
7  </div>
8  <div class="form-group">
9    <%= f.label :name, '名前' %>
10    <%= f.text_field :name, class: 'form-control' %>
11  </div>
12  <div class="form-group">
13    <%= f.label :body, '本文' %>
14    <%= f.text_area :body, class: 'form-control', rows: 10 %>
15  </div>
16  <span class="image">
17  <%= f.file_field :image, accept: "image/jpeg,image/gif,image/png" %>
18  </span>
19    <div class="form-group">
20    <span>タグ</span>
21    <%= f.collection_check_boxes(:tag_ids, Tag.all, :id, :name) do |tag| %>
22      <div class="form-check">
23        <%= tag.label class: 'form-check-label' do %>
24          <%= tag.check_box class: 'form-check-input' %>
25          <%= tag.text %>
26        <% end %>
27      </div>
28    <% end %>
29  </div>
30  <%= f.submit '保存', class: 'btn btn-primary' %>
31<% end %>
32
33<script type="text/javascript">
34  $("#board_image").bind("change", function() {
35    var size_in_megabytes = this.files[0].size/1024/1024;
36    if (size_in_megabytes > 5) {
37      alert("Maximum file size is 5MB. Please choose a smaller file.");
38      $("#board_image").val("");
39    }
40  });
41</script>
42

Ruby
1#boards_controller
2
3class BoardsController < ApplicationController
4  before_action :set_target_board, only: %i[show edit update destroy]
5
6  def index
7    @boards = params[:tag_id].present? ? Tag.find(params[:tag_id]).boards : Board.all.order(id: "DESC") 
8    @boards = @boards.page(params[:page])
9    @boards_count = Board.all.count
10    @today_count = Board.created_today.count
11    @lastmonth_count = Board.created_last_month.count
12    @month_count = Board.created_month.count
13  end
14
15  def new
16    @board = Board.new(flash[:board])
17  end
18
19  def create
20    board = Board.new(board_params)
21    board.image.attach(params[:board][:image])
22    if board.save
23      flash[:notice] = "「#{board.title}」の掲示板を作成しました"
24      redirect_to board
25    else
26      redirect_back fallback_location: root_path, flash: {
27        board: board,
28        error_messages: board.errors.full_messages
29      }
30    end
31  end
32
33  def show
34    @comment = Comment.new(board_id: @board.id)
35  end
36
37  def edit
38    @board.attributes = flash[:board] if flash[:board]
39  end
40
41  def update
42    if @board.update(board_params)
43      redirect_to @board
44    else
45     redirect_back fallback_location: root_path , flash: {
46        board: @board,
47        error_messages: @board.errors.full_messages
48      }
49    end
50  end
51
52  def destroy
53    @board.destroy
54    redirect_to boards_path, flash: { notice: "「#{@board.title}」の掲示板が削除されました" }
55  end
56
57  private
58
59  def board_params
60    params.require(:board).permit(:content, :image, :name, :title, :body, tag_ids: [])
61  end
62
63  def set_target_board
64    @board = Board.find(params[:id])
65  end
66end

Ruby
1#model/boards.rb
2class Board < ApplicationRecord
3  has_many :comments, dependent: :delete_all
4  has_many :board_tag_relations, dependent: :delete_all
5  has_many :tags, through: :board_tag_relations
6  has_one_attached :image
7  belongs_to :user
8
9  validates :name, length: { maximum: 10 }
10  validates :title, presence: true, length: { maximum: 30 }
11  validates :body, presence: true, length: { maximum: 1000 }
12
13  scope :created_today, -> { where(created_at: Time.zone.now.all_day) } # 今日
14  scope :created_last_month, -> { where(created_at: Time.zone.now.prev_month.all_day) } # １ヶ月前の投稿
15  scope :created_month, -> { where(created_at: Time.zone.now.all_month) } # 今月の投稿
16
17  validates :image,   content_type: { in: %w[image/jpeg image/gif image/png],
18                                      message: "must be a valid image format" },
19                      size:         { less_than: 5.megabytes,
20                                      message: "should be less than 5MB" }
21
22  # 表示用のリサイズ済み画像を返す
23  def display_image
24    image.variant(resize_to_limit: [500, 500])
25  end
26end

現状github

Ruby
1#Gemfile
2
3source 'https://rubygems.org'
4git_source(:github) { |repo| "https://github.com/#{repo}.git" }
5
6ruby '2.7.5'
7
8# Bundle edge Rails instead: gem 'rails', github: 'rails/rails', branch: 'main'
9gem 'rails', '~> 6.1.4', '>= 6.1.4.6'
10gem 'active_storage_validations', '0.8.2'
11# Use mysql as the database for Active Record
12gem 'mysql2', '~> 0.5'
13# Use Puma as the app server
14gem 'puma', '~> 5.0'
15# Use SCSS for stylesheets
16gem 'sass-rails', '>= 6'
17# Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
18gem 'webpacker', '~> 5.0'
19# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
20gem 'turbolinks', '~> 5'
21# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
22gem 'jbuilder', '~> 2.7'
23# Use Redis adapter to run Action Cable in production
24# gem 'redis', '~> 4.0'
25# Use Active Model has_secure_password
26gem 'bcrypt', '~> 3.1.7'
27
28# Use Active Storage variant
29# gem 'image_processing', '~> 1.2'
30
31# Reduces boot times through caching; required in config/boot.rb
32gem 'bootstrap', '~>4.0.0'
33gem 'kaminari'
34gem 'rails-i18n'
35gem 'jquery-rails'
36
37group :development, :test do
38  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
39  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
40  gem 'rails-flog', require: 'flog'
41  gem 'rspec-rails', '~> 3.8'
42  gem 'rails-controller-testing'
43end
44
45group :development do
46  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
47  gem 'web-console', '>= 4.1.0'
48  # Display performance information such as SQL time and flame graphs for each request in your browser.
49  # Can be configured to work on production as well see: https://github.com/MiniProfiler/rack-mini-profiler/blob/master/README.md
50  gem 'rack-mini-profiler', '~> 2.0'
51  gem 'listen', '~> 3.3'
52  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
53  gem 'spring'
54end
55
56group :test do
57  # Adds support for Capybara system testing and selenium driver
58  gem 'capybara', '>= 3.26'
59  gem 'selenium-webdriver'
60  # Easy installation and use of web drivers to run system tests with browsers
61  gem 'webdrivers'
62end
63
64# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
65gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
66