diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
new file mode 100644
index 0000000..1124421
--- /dev/null
+++ b/.devcontainer/Dockerfile
@@ -0,0 +1,35 @@
+# Use the official Ruby image as base
+FROM ruby:3.3-slim
+
+# Install system dependencies
+RUN apt-get update -qq && apt-get install -y \
+  build-essential \
+  git \
+  curl \
+  sqlite3 \
+  libsqlite3-dev \
+  libyaml-dev \
+  && rm -rf /var/lib/apt/lists/*
+
+# Install Node.js (for documentation site)
+RUN curl -fsSL https://deb.nodesource.com/setup_lts.x | bash - \
+  && apt-get install -y nodejs
+
+# Create a non-root user
+RUN groupadd --gid 1000 user \
+  && useradd --uid 1000 --gid user --shell /bin/bash --create-home user
+
+# Set up the working directory
+WORKDIR /workspace
+
+# Install bundler
+RUN gem install bundler
+
+# Create cache directory for gems
+RUN mkdir -p /usr/local/bundle && chown -R user:user /usr/local/bundle
+
+# Switch to non-root user
+USER user
+
+# Set the default shell
+SHELL ["/bin/bash", "-c"]
diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
new file mode 100644
index 0000000..7a8f87a
--- /dev/null
+++ b/.devcontainer/devcontainer.json
@@ -0,0 +1,18 @@
+{
+  "name": "Inertia Rails Development",
+  "dockerComposeFile": "docker-compose.yml",
+  "service": "app",
+  "workspaceFolder": "/workspace",
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "shopify.ruby-lsp",
+        "ms-vscode.vscode-json",
+        "redhat.vscode-yaml"
+      ]
+    }
+  },
+  "forwardPorts": [3000, 5173],
+  "postCreateCommand": "bin/setup",
+  "remoteUser": "user"
+}
diff --git a/.devcontainer/docker-compose.yml b/.devcontainer/docker-compose.yml
new file mode 100644
index 0000000..38c2017
--- /dev/null
+++ b/.devcontainer/docker-compose.yml
@@ -0,0 +1,15 @@
+services:
+  app:
+    build:
+      context: ..
+      dockerfile: .devcontainer/Dockerfile
+    volumes:
+      - ..:/workspace:cached
+      - gem_cache:/usr/local/bundle
+    command: sleep infinity
+    environment:
+      - RAILS_ENV=development
+    working_dir: /workspace
+
+volumes:
+  gem_cache:
diff --git a/spec/rails_helper.rb b/spec/rails_helper.rb
index 03e1f42..484b2a5 100644
--- a/spec/rails_helper.rb
+++ b/spec/rails_helper.rb
@@ -2,7 +2,7 @@
 # Requiring logger fixes an issue between concurrent-ruby and activesupport in Rails < 7.1
 # https://github.com/rails/rails/issues/54260
 require 'logger'
-ENV['RAILS_ENV'] ||= 'test'
+ENV['RAILS_ENV'] = 'test'
 
 require File.expand_path('../dummy/config/environment', __FILE__)