developmentモードだといけるのですが、productionモードだとエラーが出てしまいます。

開発環境

ruby 2.6.4
Rails 6.0.2.2
Docker version 19.03.8, build afacb8b
docker-compose version 1.25.4, build 8d51620a

前提・実現したいこと

Ruby on Rails6実践ガイドという書籍にてハンズオン形式にて勉強しています。
現在ログイン機能を実装しているのですが、デベロップメントモードならば実装できているのですが、プロダクションモードだと動きません。

この画面からログインしたいのですが、

このように500 internal server errorが出てしまいます。
rails s コマンドは

bin/rails s -e production -b 0.0.0.0

bin/rails s -e development -b 0.0.0.0

で起動させています。
ログイン周りのコードは
app/controllers/staff/sessions_controller.rb

class Staff::SessionsController < Staff::Base
  def new
    if current_staff_member
      redirect_to :staff_root
    else
      @form = Staff::LoginForm.new
      render action: "new"
    end
  end

  def create
    @form = Staff::LoginForm.new(params[:staff_login_form])
    if @form.email.present?
        staff_member =
        StaffMember.find_by("LOWER(email) = ?", @form.email.downcase)
    end
    if staff_member
      session[:staff_member_id] = staff_member.id
      redirect_to :staff_root
    else
      render action: "new"
    end
  end
end

app/controllers/staff/base.rb

class Staff::Base < ApplicationController

private  def current_staff_member
    if session[:staff_member_id]
      @current_staff_member ||= StaffMember.find_by(id: session[:staff_member_id])
    end
  end

  helper_method :current_staff_member
end

app/controllers/staff/apprication_controller

class ApplicationController < ActionController::Base
  layout :set_layout

  class Forbidden < ActionController::ActionControllerError; end
  class IpAddressRejected < ActionController::ActionControllerError; end

  include ErrorHandlers if Rails.env.production?

  private
  
  def set_layout
    if params[:controller].match(%r{\A(staff|admin|cutomer)/})
      Regexp.last_match[1]
    else
      "customer" 
    end   
  end

end

views/staff/sessions/new.html.erb(ログイン画面)

<% @title = "ログイン" %>

<div id="login-form">
  <h1><%= @title %></h1>
  <%= form_with model: @form, url: :staff_session do |f| %>
    <div>
      <%= f.label :email, "メールアドレス" %>
      <%= f.text_field :email %>    
    </div>
    <div>
      <%= f.label :password, "パスワード" %>
      <%= f.password_field :password %>
    </div>
    <div>
      <%= f.submit "ログイン" %>
    </div>
  <% end %>
</div>

になります。

developmentモードでのログ(これは成功しています。)

Started GET "/staff" for 172.18.0.1 at 2020-03-23 09:33:11 +0000
   (7.7ms)  SELECT "schema_migrations"."version" FROM "schema_migrations" ORDER BY "schema_migrations"."version" ASC
Processing by Staff::TopController#index as HTML
  Rendering staff/top/index.html.erb within layouts/staff
  Rendered staff/top/index.html.erb within layouts/staff (Duration: 15.3ms | Allocations: 232)
[Webpacker] Everything's up-to-date. Nothing to do
  Rendered staff/shared/_header.html.erb (Duration: 7.5ms | Allocations: 176)
  Rendered shared/_footer.html.erb (Duration: 6.9ms | Allocations: 84)
Completed 200 OK in 769ms (Views: 760.2ms | ActiveRecord: 0.0ms | Allocations: 15110)


Started GET "/staff/login" for 172.18.0.1 at 2020-03-23 09:33:14 +0000
Processing by Staff::SessionsController#new as HTML
  Rendering staff/sessions/new.html.erb within layouts/staff
  Rendered staff/sessions/new.html.erb within layouts/staff (Duration: 20.9ms | Allocations: 1102)
[Webpacker] Everything's up-to-date. Nothing to do
  Rendered staff/shared/_header.html.erb (Duration: 0.3ms | Allocations: 36)
  Rendered shared/_footer.html.erb (Duration: 0.1ms | Allocations: 5)
Completed 200 OK in 227ms (Views: 209.4ms | ActiveRecord: 0.0ms | Allocations: 5722)


Started POST "/staff/session" for 172.18.0.1 at 2020-03-23 09:33:21 +0000
Processing by Staff::SessionsController#create as HTML
  Parameters: {"authenticity_token"=>"iaoVfjwTz6jc9NSC7/BcKgBM77t46dveCi4RQUDaLGYodk9a7trbrfbpC/SQfBZM4QBeZ2peonYkZe3HxfkWBw==", "staff_login_form"=>{"email"=>"taro@example.com", "password"=>"[FILTERED]"}, "commit"=>"ログイン"}
  StaffMember Load (13.4ms)  SELECT "staff_members".* FROM "staff_members" WHERE (LOWER(email) = 'taro@example.com') LIMIT $1  [["LIMIT", 1]]
  ↳ app/controllers/staff/sessions_controller.rb:15:in `create'
Redirected to http://localhost:3000/staff
Completed 302 Found in 109ms (ActiveRecord: 54.0ms | Allocations: 9814)


Started GET "/staff" for 172.18.0.1 at 2020-03-23 09:33:21 +0000
Processing by Staff::TopController#index as HTML
  Rendering staff/top/index.html.erb within layouts/staff
  Rendered staff/top/index.html.erb within layouts/staff (Duration: 0.2ms | Allocations: 7)
[Webpacker] Everything's up-to-date. Nothing to do
  StaffMember Load (3.7ms)  SELECT "staff_members".* FROM "staff_members" WHERE "staff_members"."id" = $1 LIMIT $2  [["id", 1], ["LIMIT", 1]]
  ↳ app/controllers/staff/base.rb:5:in `current_staff_member'
  Rendered staff/shared/_header.html.erb (Duration: 28.4ms | Allocations: 1092)
  Rendered shared/_footer.html.erb (Duration: 0.1ms | Allocations: 5)
Completed 200 OK in 364ms (Views: 357.4ms | ActiveRecord: 4.3ms | Allocations: 5026)

productionモードでのログ

tail -f apps/baukis2/log/production.log
I, [2020-03-23T09:07:08.834014 #611]  INFO -- : [59790067-2449-4e14-a2d5-41e4ece32755]   Rendered shared/_footer.html.erb (Duration: 0.1ms | Allocations: 5)
I, [2020-03-23T09:07:08.834822 #611]  INFO -- : [59790067-2449-4e14-a2d5-41e4ece32755] Completed 200 OK in 42ms (Views: 38.2ms | Allocations: 2055)
I, [2020-03-23T09:07:15.011573 #611]  INFO -- : [9e7d3c8f-9e7f-4c14-9a1e-6da9f7bf7304] Started POST "/staff/session" for 172.18.0.1 at 2020-03-23 09:07:15 +0000
I, [2020-03-23T09:07:15.014584 #611]  INFO -- : [9e7d3c8f-9e7f-4c14-9a1e-6da9f7bf7304] Processing by Staff::SessionsController#create as HTML
I, [2020-03-23T09:07:15.015529 #611]  INFO -- : [9e7d3c8f-9e7f-4c14-9a1e-6da9f7bf7304]   Parameters: {"authenticity_token"=>"nrvUz+IDcVhjzIb9EUPxa/TpXzxfxU3HdJy5rYxzUjyqaLPS4y/eTxpf8MpijklrdRCkfjlOokxKlLKMP/haBg==", "staff_login_form"=>{"email"=>"taro@example.com", "password"=>"[FILTERED]"}, "commit"=>"ログイン"}
I, [2020-03-23T09:07:15.256850 #611]  INFO -- : [9e7d3c8f-9e7f-4c14-9a1e-6da9f7bf7304]   Rendering errors/internal_server_error.html.erb within layouts/staff
I, [2020-03-23T09:07:15.261264 #611]  INFO -- : [9e7d3c8f-9e7f-4c14-9a1e-6da9f7bf7304]   Rendered errors/internal_server_error.html.erb within layouts/staff (Duration: 3.7ms | Allocations: 91)
I, [2020-03-23T09:07:15.264569 #611]  INFO -- : [9e7d3c8f-9e7f-4c14-9a1e-6da9f7bf7304]   Rendered staff/shared/_header.html.erb (Duration: 0.7ms | Allocations: 46)
I, [2020-03-23T09:07:15.265905 #611]  INFO -- : [9e7d3c8f-9e7f-4c14-9a1e-6da9f7bf7304]   Rendered shared/_footer.html.erb (Duration: 0.2ms | Allocations: 5)
I, [2020-03-23T09:07:15.267106 #611]  INFO -- : [9e7d3c8f-9e7f-4c14-9a1e-6da9f7bf7304] Completed 500 Internal Server Error in 251ms (Views: 23.8ms | ActiveRecord: 149.8ms | Allocations: 4016)
¥I, [2020-03-23T09:23:58.264584 #611]  INFO -- : [71baba8f-7758-4b39-8646-2fa4514b770d] Started POST "/staff/session" for 172.18.0.1 at 2020-03-23 09:23:58 +0000
I, [2020-03-23T09:23:58.268226 #611]  INFO -- : [71baba8f-7758-4b39-8646-2fa4514b770d] Processing by Staff::SessionsController#create as HTML
I, [2020-03-23T09:23:58.269486 #611]  INFO -- : [71baba8f-7758-4b39-8646-2fa4514b770d]   Parameters: {"authenticity_token"=>"98gma8uL/1yiY4Ff9y58Csmqqj+JHr9O2yfsGdUpYlL9tvUsqZBJ5PUmwMvukIhn8aV1D7Rsx4Tpo47oEV+feQ==", "staff_login_form"=>{"email"=>"taro@example.com", "password"=>"[FILTERED]"}, "commit"=>"ログイン"}
I, [2020-03-23T09:23:58.367705 #611]  INFO -- : [71baba8f-7758-4b39-8646-2fa4514b770d]   Rendering errors/internal_server_error.html.erb within layouts/staff
I, [2020-03-23T09:23:58.368861 #611]  INFO -- : [71baba8f-7758-4b39-8646-2fa4514b770d]   Rendered errors/internal_server_error.html.erb within layouts/staff (Duration: 0.1ms | Allocations: 4)
I, [2020-03-23T09:23:58.370283 #611]  INFO -- : [71baba8f-7758-4b39-8646-2fa4514b770d]   Rendered staff/shared/_header.html.erb (Duration: 0.1ms | Allocations: 39)
I, [2020-03-23T09:23:58.371588 #611]  INFO -- : [71baba8f-7758-4b39-8646-2fa4514b770d]   Rendered shared/_footer.html.erb (Duration: 0.0ms | Allocations: 5)
I, [2020-03-23T09:23:58.372681 #611]  INFO -- : [71baba8f-7758-4b39-8646-2fa4514b770d] Completed 500 Internal Server Error in 102ms (Views: 5.3ms | ActiveRecord: 44.4ms | Allocations: 2985)

になります。

よろしくお願いいたします。