Build and deploy a full app with Claude Code in 2026 (full tutorial)

Video Description

By the end of this video, you'll learn how to build a full-stack app with Claude Code, connect a backend database, set up user login, and deploy it live on the internet through Vercel - all starting from one simple prompt. Learn the difference between Claude Code and Cowork here: https://youtu.be/TAXdDEZaR9U Is Codex better? https://youtu.be/dYQjixUlj_0 Stay up-to date with all things AI with our powerful daily newsletter: https://nocode.mba/daily This is a complete beginner's guide to Claude Code. Even if you've only used tools like Lovable before, you'll be able to follow along and build your first production-ready app. We're going to build a tennis court booking app with day-by-day view, booking functionality, user authentication, and a backend database. ━━━━━━━━━━━━━━━━━━━━━━ STEP-BY-STEP WALKTHROUGH: ━━━━━━━━━━━━━━━━━━━━━━ 1️⃣ SETUP (GETTING STARTED) - Download Claude Desktop app (easier than terminal) - Open a new empty folder for your project - Use Opus 4.6 model (requires paid Claude plan) - Enable "auto accept edits" in permissions - Slash commands available for preset actions 2️⃣ YOUR FIRST PROMPT & PLAN MODE Simple prompt: "Let's build a simple app that helps people book tennis courts at their local courts. Start by building something I can test that we can add a backend and authentication later. Start by just creating a plan." Claude enters plan mode, asks clarifying questions. Review the plan, then approve to start coding. 3️⃣ TESTING LOCALLY App runs on localhost:3001 automatically. If not, ask Claude "How do I run this locally?" Test the booking functionality with sample data - everything works! 4️⃣ ADDING BACKEND DATABASE WITH NEON Instead of Supabase (common choice), trying Neon database. Simple prompt: "Add user authentication and a database using Neon. Walk me through the setup." Claude guides you through: - Creating Neon account - Setting up database - Adding authentication - Connecting everything to your app 5️⃣ TESTING AUTHENTICATION Sign up with new account, sign in, book courts - all data persists in real database now. 6️⃣ DEPLOYING TO GITHUB Ask Claude to push code to GitHub. It creates repository and handles all Git commands automatically. Code is now backed up and version-controlled. 7️⃣ DEPLOYING TO VERCEL Two options: - Let Claude deploy via command line (requires Vercel credentials) - Deploy manually through Vercel interface (beginner-friendly) Manual process: → Connect Vercel to GitHub → Import your repository → Click deploy 8️⃣ FIXING DEPLOYMENT ERRORS Common issue: Missing environment variables. Copy error from Vercel, paste into Claude Code. It fixes the issue and pushes update to GitHub. 9️⃣ ADDING ENVIRONMENT VARIABLES TO VERCEL CRITICAL STEP: Add your database URL, auth base URL, and cookie secret to Vercel's environment variables (Settings → Environment Variables). Never push secrets to GitHub - add them directly in Vercel. 🔟 FINAL DEPLOYMENT Redeploy after adding environment variables. App is now live on the internet! Anyone can access it, sign up, sign in, and book tennis courts. ━━━━━━━━━━━━━━━━━━━━━━ KEY LEARNINGS: ━━━━━━━━━━━━━━━━━━━━━━ ✓ Claude Code can handle the entire development workflow ✓ Plan mode helps ensure you're building the right thing ✓ Neon is a great alternative to Supabase ✓ GitHub + Vercel workflow is industry standard ✓ Environment variables must be added separately in Vercel for security ✓ These same skills transfer to Codex (OpenAI's coding agent) ━━━━━━━━━━━━━━━━━━━━━━ PRO TIPS: ━━━━━━━━━━━━━━━━━━━━━━ 💡 Use auto accept edits to speed up workflow 💡 Always start with a plan 💡 Test locally before deploying 💡 Copy error messages from deployment and paste into Claude 💡 Understanding this workflow helps with ANY AI builder (even Lovable) ━━━━━━━━━━━━━━━━━━━━━━ WHAT YOU'VE ACCOMPLISHED: ━━━━━━━━━━━━━━━━━━━━━━ From idea → local app → database + auth → GitHub → live on internet. You now have full control over your code and understand how everything connects. ⏰ TIMESTAMPS: 0:00 - Introduction & setup 0:48 - Creating new folder & settings 1:27 - First prompt & plan mode 3:24 - Testing the local app 3:59 - Adding Neon database & authentication 5:30 - Testing user signup and login 7:40 - GitHub integration 12:04 - Deploying to Vercel 13:28 - Fixing deployment errors 15:27 - Final deployment & live app 15:56 - Skills transfer to Codex 💬 COMMENT BELOW: If you're a beginner, does this feel accessible or still too complicated? Your feedback helps me make better tutorials! Subscribe for more Claude Code and AI coding tutorials! #claudecode #anthropic #aicoding #vercel #neon #beginners