Fix devcontainer setup and upgrade Ruby to 3.4.7

.devcontainer/Dockerfile

@@ -0,0 +1,7 @@
+# Make sure RUBY_VERSION matches the Ruby version in .ruby-version
+ARG RUBY_VERSION=3.4.7
+FROM ghcr.io/rails/devcontainer/images/ruby:$RUBY_VERSION
+
+# Ensure binding is always 0.0.0.0
+# Binds the server to all IP addresses of the container, so it can be accessed from outside the container.
+ENV BINDING="0.0.0.0"

.devcontainer/compose.yaml

@@ -0,0 +1,12 @@
+name: "ruby_ui"
+
+services:
+  app:
+    build:
+      context: ..
+      dockerfile: .devcontainer/Dockerfile
+
+    volumes:
+      - ../../ruby_ui:/workspaces/ruby_ui:cached
+      # Overrides default command so things don't shut down after the process ends.
+    command: sleep infinity

.devcontainer/devcontainer.json

@@ -1,33 +1,29 @@
-// For format details, see https://aka.ms/devcontainer.json. For config options, see the
-// README at: https://github.com/devcontainers/templates/tree/main/src/ruby
+// For format details, see https://containers.dev/implementors/json_reference/.
+// For config options, see the README at: https://github.com/devcontainers/templates/tree/main/src/ruby
 {
-  "name": "RubyUI",
-  // Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
-  "image": "ghcr.io/rails/devcontainer/images/ruby:3.3.3",
+  "name": "ruby_ui",
+  "dockerComposeFile": "compose.yaml",
+  "service": "app",
+  "workspaceFolder": "/workspaces/${localWorkspaceFolderBasename}",
   // Features to add to the dev container. More info: https://containers.dev/features.
-  //  Make sure RUBY_VERSION matches the Ruby version in .ruby-version
   "features": {
-    "ghcr.io/devcontainers/features/github-cli:1": {}
+    "ghcr.io/devcontainers/features/github-cli:1": {},
+    "ghcr.io/devcontainers/features/docker-outside-of-docker:1": {
+      "moby": false
+    }
   },
   "customizations": {
     "vscode": {
       "extensions": [
         "testdouble.vscode-standard-ruby",
         "Shopify.ruby-lsp"
-      ],
-      "settings": {
-        "rubyLsp.rubyVersionManager": {
-          "identifier": "rbenv"
-        }
-      }
+      ]
     }
   },
-  // Use 'forwardPorts' to make a list of ports inside the container available locally.
-  // "forwardPorts": [],
-  // Use 'postCreateCommand' to run commands after the container is created.
-  "onCreateCommand": "bundle install"
   // Configure tool-specific properties.
   // "customizations": {},
-  // Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
-  // "remoteUser": "root"
-}
+  // Uncomment to connect as root instead. More info: https://containers.dev/implementors/json_reference/#remoteUser.
+  // "remoteUser": "root",
+  // Use 'postCreateCommand' to run commands after the container is created.
+  "postCreateCommand": "bundle check || bundle install"
+}

.standard.yml

@@ -1,3 +1,3 @@
-ruby_version: 3.3
+ruby_version: 3.4
 format: progress
 parallel: true

.tool-versions

@@ -1,2 +1,2 @@
-ruby 3.3.5
+ruby 3.4.7
 

LICENSE.txt

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2024 RubyUI
+Copyright (c) 2025 RubyUI
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal