diff --git a/.gitignore b/.gitignore
index 81452db..24d519b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -29,3 +29,6 @@
 
 # Ignore master key for decrypting credentials and more.
 /config/master.key
+
+# Ignore vendor
+/vendor
diff --git a/.node-version b/.node-version
new file mode 100644
index 0000000..fc2cbe5
--- /dev/null
+++ b/.node-version
@@ -0,0 +1 @@
+15.14.0
diff --git a/.rubocop.yml b/.rubocop.yml
index 51b6561..31b59a4 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,4 +1,7 @@
 # This file overrides https://github.com/bbatsov/rubocop/blob/master/config/default.yml
+
+require:
+  - rubocop-rails
   
 AllCops:
   NewCops: enable
diff --git a/Gemfile b/Gemfile
index 69a1e99..3ce42f9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,8 +5,8 @@ ruby '2.6.6'
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '~> 5.2.5'
-# Use sqlite3 as the database for Active Record
-gem 'sqlite3'
+gem 'sqlite3', group: :development
+gem 'pg', group: :production
 # Use Puma as the app server
 gem 'puma', '~> 3.11'
 # Use SCSS for stylesheets
@@ -18,8 +18,6 @@ gem 'uglifier', '>= 1.3.0'
 
 # Use CoffeeScript for .coffee assets and views
 gem 'coffee-rails', '~> 4.2'
-# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
-gem 'turbolinks', '~> 5'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 # gem 'jbuilder', '~> 2.5'
 # Use Redis adapter to run Action Cable in production
@@ -38,6 +36,7 @@ gem 'bootsnap', '>= 1.1.0', require: false
 
 gem 'bootstrap', '~> 4.5.0'
 gem 'font-awesome-sass', '~> 5.11.2'
+gem 'sassc', '2.1.0'
 gem 'jquery-rails'
 gem 'sorcery', '0.15.0'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 4d91a41..c487244 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -96,7 +96,7 @@ GEM
     faraday-excon (1.1.0)
     faraday-net_http (1.0.1)
     faraday-net_http_persistent (1.1.0)
-    ffi (1.15.0)
+    ffi (1.15.5)
     font-awesome-sass (5.11.2)
       sassc (>= 1.11)
     globalid (0.4.2)
@@ -140,6 +140,7 @@ GEM
     parallel (1.20.1)
     parser (3.0.1.0)
       ast (~> 2.4.1)
+    pg (1.3.5)
     popper_js (1.16.0)
     pry (0.14.1)
       coderay (~> 1.1)
@@ -240,7 +241,7 @@ GEM
       sprockets (>= 2.8, < 4.0)
       sprockets-rails (>= 2.0, < 4.0)
       tilt (>= 1.1, < 3)
-    sassc (2.4.0)
+    sassc (2.1.0)
       ffi (~> 1.9)
     sassc-rails (2.1.2)
       railties (>= 4.0.0)
@@ -270,9 +271,6 @@ GEM
     thor (1.1.0)
     thread_safe (0.3.6)
     tilt (2.0.10)
-    turbolinks (5.2.1)
-      turbolinks-source (~> 5.2)
-    turbolinks-source (5.2.0)
     tzinfo (1.2.9)
       thread_safe (~> 0.1)
     uglifier (4.2.0)
@@ -308,6 +306,7 @@ DEPENDENCIES
   font-awesome-sass (~> 5.11.2)
   jquery-rails
   listen (>= 3.0.5, < 3.2)
+  pg
   pry
   pry-byebug
   pry-doc
@@ -320,11 +319,11 @@ DEPENDENCIES
   rubocop-checkstyle_formatter
   rubocop-rails
   sass-rails (~> 5.0)
+  sassc (= 2.1.0)
   sorcery (= 0.15.0)
   spring
   spring-watcher-listen (~> 2.0.0)
   sqlite3
-  turbolinks (~> 5)
   tzinfo-data
   uglifier (>= 1.3.0)
   web-console (>= 3.3.0)
diff --git a/README.md b/README.md
index 0f10412..b2fb251 100644
--- a/README.md
+++ b/README.md
@@ -6,4 +6,7 @@
 
 - Ruby 2.6.6 を設定
 - プロジェクトで利用するgemをインストール
+  - `bundle config --local path 'vendor/bundle'` 
+  - `bundle config --local build.sassc -- --disable-march-tune-native`
+  - `bundle install`
 - データベース、テーブルを作成
diff --git a/app/assets/javascripts/application.js b/app/assets/javascripts/application.js
index bfbf451..3ebdd26 100644
--- a/app/assets/javascripts/application.js
+++ b/app/assets/javascripts/application.js
@@ -15,5 +15,4 @@
 //= require bootstrap-sprockets
 //= require rails-ujs
 //= require activestorage
-//= require turbolinks
 //= require_tree .
diff --git a/app/views/layouts/application.html.erb b/app/views/layouts/application.html.erb
index 7d33891..d928a97 100644
--- a/app/views/layouts/application.html.erb
+++ b/app/views/layouts/application.html.erb
@@ -5,8 +5,8 @@
     <%= csrf_meta_tags %>
     <%= csp_meta_tag %>
 
-    <%= stylesheet_link_tag    'application', media: 'all', 'data-turbolinks-track': 'reload' %>
-    <%= javascript_include_tag 'application', 'data-turbolinks-track': 'reload' %>
+    <%= stylesheet_link_tag    'application', media: 'all' %>
+    <%= javascript_include_tag 'application' %>
   </head>
 
   <body>
diff --git a/app/views/shared/_before_login_header.html.erb b/app/views/shared/_before_login_header.html.erb
index 25ccc8f..175de25 100644
--- a/app/views/shared/_before_login_header.html.erb
+++ b/app/views/shared/_before_login_header.html.erb
@@ -8,7 +8,7 @@
     <div class="collapse navbar-collapse" id="navbarSupportedContent">
       <ul class="navbar-nav ml-auto main-nav align-items-center">
         <li class="nav-item">
-          <%= link_to 'ログイン', login_path, class: 'nav-link' %>
+          <%= link_to 'Login', login_path, class: 'nav-link' %>
         </li>
       </ul>
     </div>
diff --git a/app/views/shared/_header.html.erb b/app/views/shared/_header.html.erb
index 2cb8ce6..357668b 100644
--- a/app/views/shared/_header.html.erb
+++ b/app/views/shared/_header.html.erb
@@ -13,13 +13,13 @@
           </a>
 
           <div class="dropdown-menu dropdown-menu-right">
-            <%= link_to 'Post一覧', posts_path, class: 'dropdown-item' %>
-            <%= link_to 'Post作成', new_post_path, class: 'dropdown-item' %>
+            <%= link_to 'List of Posts', posts_path, class: 'dropdown-item' %>
+            <%= link_to 'New Post', new_post_path, class: 'dropdown-item' %>
           </div>
         </li>
 
         <li class="nav-item">
-          <%= link_to 'Like一覧', '#', class: 'nav-link' %>
+          <%= link_to 'List of Likes', '#', class: 'nav-link' %>
         </li>
 
         <li class="nav-item dropdown dropdown-slide">
@@ -29,9 +29,9 @@
           <div class="dropdown-menu dropdown-menu-right">
             <div class="dropdown-item"><%= "#{current_user.last_name} #{current_user.first_name}" %></div>
             <div class="dropdown-divider"></div>
-            <%= link_to 'プロフィール', '#', class: 'dropdown-item' %>
+            <%= link_to 'Profile', '#', class: 'dropdown-item' %>
 
-            <%= link_to 'ログアウト', logout_path, method: :delete, class: 'dropdown-item' %>
+            <%= link_to 'Logout', logout_path, method: :delete, class: 'dropdown-item' %>
           </div>
         </li>
       </ul>
diff --git a/config/database.yml b/config/database.yml
index 0d02f24..9ea67d8 100644
--- a/config/database.yml
+++ b/config/database.yml
@@ -22,4 +22,6 @@ test:
 
 production:
   <<: *default
-  database: db/production.sqlite3
+  adapter: postgresql
+  encoding: unicode
+  pool: 5
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 1d5015c..86ca262 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -27,7 +27,7 @@
   # config.assets.css_compressor = :sass
 
   # Do not fallback to assets pipeline if a precompiled asset is missed.
-  config.assets.compile = false
+  config.assets.compile = true
 
   # `config.assets.precompile` and `config.assets.version` have moved to config/initializers/assets.rb