Deploying to Railway
Railway is the fastest way to deploy a Node.js app. Free tier is generous enough for a personal chatbot. Connect your repo, set environment variables, and it deploys automatically.
{
"scripts": {
"start": "node server.js"
}
}
# 1. Initialize git if you haven't
git init
git add .
git commit -m "Initial chatbot"
# 2. Create a .gitignore
echo "node_modules/
.env" > .gitignore
# 3. Push to GitHub
git remote add origin your-repo-url
git push -u origin main
# 4. Go to railway.app
# - New Project → Deploy from GitHub repo
# - Select your repo
# - Add environment variable: ANTHROPIC_API_KEY
# - Railway auto-detects Node.js and deploys
Production Hardening
Before sharing the URL publicly, add basic rate limiting and error handling:
// Wrap the API call in try/catch
app.post('/chat', async (req, res) => {
try {
const { message, sessionId } = req.body;
if (!message || message.length > 2000) {
return res.status(400).json({ error: 'Invalid message' });
}
// ... rest of your code ...
} catch (error) {
console.error('Error:', error.message);
res.status(500).json({
error: 'Something went wrong. Please try again.'
});
}
});
ℹ️
API costs: The Claude API charges per token. A typical conversation message costs a fraction of a cent. For a personal or small business chatbot with moderate traffic, monthly costs are usually under $5-10. Monitor your usage at console.anthropic.com.
Day 5 ExerciseDeploy and Share Your Chatbot
- Add the start script to package.json and create .gitignore.
- Push your code to a GitHub repository (public or private).
- Deploy to Railway and set the ANTHROPIC_API_KEY environment variable.
- Test the live URL — does everything work the same as local?
- Share the URL with one person. Get their feedback on the chatbot's usefulness.
Course Complete — What You've Built
- A full-stack AI chatbot: Node.js backend, clean chat UI, conversation history, and a custom system prompt.
- RAG integration to answer questions from your own documents without hallucination.
- A deployed URL on Railway with error handling and environment variables properly managed.
- A foundation for adding features: streaming, user auth, database-backed history, custom document loading.
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