diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index e50ee5c..2720462 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -10,7 +10,7 @@
     },
     "customizations": {
         "codespaces": {
-            "openFiles": ["config/routes.rb", "README.md"]
+            "openFiles": ["app/views/hello/index.html.erb", "README.md"]
         },
         "vscode": {
             "extensions": [
diff --git a/.gitignore b/.gitignore
index 886f714..eddbb4f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -33,3 +33,5 @@
 
 # Ignore master key for decrypting credentials and more.
 /config/master.key
+
+dump.rdb
diff --git a/Gemfile b/Gemfile
index 8c563a9..ff4c62c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -66,6 +66,8 @@ group :development do
 
   # Speed up commands on slow machines / big apps [https://github.com/rails/spring]
   # gem "spring"
+
+  gem "hotwire-livereload", "~> 1.2"
 end
 
 group :test do
diff --git a/Gemfile.lock b/Gemfile.lock
index e8fec78..6ef09e9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -108,8 +108,12 @@ GEM
       rubocop
       smart_properties
     erubi (1.11.0)
+    ffi (1.15.5)
     globalid (1.0.0)
       activesupport (>= 5.0)
+    hotwire-livereload (1.2.2)
+      listen (>= 3.0.0)
+      rails (>= 6.0.0)
     i18n (1.12.0)
       concurrent-ruby (~> 1.0)
     importmap-rails (1.1.5)
@@ -127,6 +131,9 @@ GEM
       rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
+    listen (3.7.1)
+      rb-fsevent (~> 0.10, >= 0.10.3)
+      rb-inotify (~> 0.9, >= 0.9.10)
     loofah (2.18.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
@@ -193,6 +200,9 @@ GEM
       zeitwerk (~> 2.5)
     rainbow (3.1.1)
     rake (13.0.6)
+    rb-fsevent (0.11.2)
+    rb-inotify (0.10.1)
+      ffi (~> 1.0)
     regexp_parser (2.5.0)
     reline (0.3.1)
       io-console (~> 0.5)
@@ -283,6 +293,7 @@ DEPENDENCIES
   capybara
   debug
   erb_lint
+  hotwire-livereload (~> 1.2)
   importmap-rails
   jbuilder
   puma (~> 5.0)
diff --git a/app/assets/stylesheets/hello.css b/app/assets/stylesheets/hello.css
new file mode 100644
index 0000000..fa4c720
--- /dev/null
+++ b/app/assets/stylesheets/hello.css
@@ -0,0 +1,45 @@
+body {
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen",
+    "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue",
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+code {
+  font-family: source-code-pro, Menlo, Monaco, Consolas, "Courier New",
+    monospace;
+}
+
+.App {
+  text-align: center;
+}
+
+.App-logo {
+  height: 40vmin;
+  pointer-events: none;
+}
+
+.App-header {
+  background-color: #282c34;
+  min-height: 100vh;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  font-size: calc(10px + 2vmin);
+  color: white;
+}
+
+.App-link {
+  color: #61dafb;
+}
+
+.heart {
+  color: #ff0000;
+}
+
+.small {
+  font-size: 0.75rem;
+}
diff --git a/app/controllers/hello_controller.rb b/app/controllers/hello_controller.rb
new file mode 100644
index 0000000..5203753
--- /dev/null
+++ b/app/controllers/hello_controller.rb
@@ -0,0 +1,4 @@
+class HelloController < ApplicationController
+  def index
+  end
+end
diff --git a/app/helpers/hello_codespaces_helper.rb b/app/helpers/hello_codespaces_helper.rb
new file mode 100644
index 0000000..874a2ca
--- /dev/null
+++ b/app/helpers/hello_codespaces_helper.rb
@@ -0,0 +1,2 @@
+module HelloCodespacesHelper
+end
diff --git a/app/views/hello/index.html.erb b/app/views/hello/index.html.erb
new file mode 100644
index 0000000..e705171
--- /dev/null
+++ b/app/views/hello/index.html.erb
@@ -0,0 +1,11 @@
+<div class="App">
+  <header class="App-header">
+    <img src="Octocat.png" class="App-logo" alt="logo" />
+    <p>
+      GitHub Codespaces <span class="heart">♥️</span> Rails
+    </p>
+    <p class="small">
+      Edit <code>app/views/hello/index.html.erb</code> and see changes live!
+    </p>
+  </header>
+</div>
diff --git a/app/views/layouts/application.html.erb b/app/views/layouts/application.html.erb
index 0d23b0e..fa5e3a0 100644
--- a/app/views/layouts/application.html.erb
+++ b/app/views/layouts/application.html.erb
@@ -8,6 +8,7 @@
 
     <%= stylesheet_link_tag "application", "data-turbo-track": "reload" %>
     <%= javascript_importmap_tags %>
+    <%= hotwire_livereload_tags if Rails.env.development? %>
   </head>
 
   <body>
diff --git a/config/environments/development.rb b/config/environments/development.rb
index bac3264..224bf90 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -59,8 +59,9 @@ Rails.application.configure do
   # Suppress logger output for asset requests.
   config.assets.quiet = true
 
+  pf_domain = ENV['GITHUB_CODESPACES_PORT_FORWARDING_DOMAIN']
   config.action_dispatch.default_headers = {
-    'X-Frame-Options' => 'ALLOW-FROM preview.app.github.dev'
+    'X-Frame-Options' => "ALLOW-FROM #{pf_domain}"
   }
 
   # Raises error for missing translations.
@@ -73,5 +74,8 @@ Rails.application.configure do
   # config.action_cable.disable_request_forgery_protection = true
 
   # Allow requests from our preview domain.
-  config.hosts << "#{ENV['CODESPACE_NAME']}-3000.preview.app.github.dev"
+  pf_host = "#{ENV['CODESPACE_NAME']}-3000.#{pf_domain}"
+  config.hosts << pf_host
+
+  config.action_cable.allowed_request_origins = ["https://#{pf_host}"]
 end
diff --git a/config/routes.rb b/config/routes.rb
index 262ffd5..f28ca9f 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,6 +1,3 @@
 Rails.application.routes.draw do
-  # Define your application routes per the DSL in https://guides.rubyonrails.org/routing.html
-
-  # Defines the root path route ("/")
-  # root "articles#index"
+  root "hello#index"
 end
diff --git a/public/Octocat.png b/public/Octocat.png
new file mode 100644
index 0000000..91057da
Binary files /dev/null and b/public/Octocat.png differ
diff --git a/test/controllers/hello_codespaces_controller_test.rb b/test/controllers/hello_codespaces_controller_test.rb
new file mode 100644
index 0000000..d17cd16
--- /dev/null
+++ b/test/controllers/hello_codespaces_controller_test.rb
@@ -0,0 +1,8 @@
+require "test_helper"
+
+class HelloCodespacesControllerTest < ActionDispatch::IntegrationTest
+  test "should get index" do
+    get "/"
+    assert_response :success
+  end
+end
diff --git a/vendor/cache/ffi-1.15.5.gem b/vendor/cache/ffi-1.15.5.gem
new file mode 100644
index 0000000..a632047
Binary files /dev/null and b/vendor/cache/ffi-1.15.5.gem differ
diff --git a/vendor/cache/hotwire-livereload-1.2.2.gem b/vendor/cache/hotwire-livereload-1.2.2.gem
new file mode 100644
index 0000000..bfd2f2c
Binary files /dev/null and b/vendor/cache/hotwire-livereload-1.2.2.gem differ
diff --git a/vendor/cache/listen-3.7.1.gem b/vendor/cache/listen-3.7.1.gem
new file mode 100644
index 0000000..5e1eed5
Binary files /dev/null and b/vendor/cache/listen-3.7.1.gem differ
diff --git a/vendor/cache/rb-fsevent-0.11.2.gem b/vendor/cache/rb-fsevent-0.11.2.gem
new file mode 100644
index 0000000..e645266
Binary files /dev/null and b/vendor/cache/rb-fsevent-0.11.2.gem differ
diff --git a/vendor/cache/rb-inotify-0.10.1.gem b/vendor/cache/rb-inotify-0.10.1.gem
new file mode 100644
index 0000000..276590b
Binary files /dev/null and b/vendor/cache/rb-inotify-0.10.1.gem differ