Deploy your Node.js app to Fly.io
Step-by-step deployment help for Node.js apps on Fly.io. We fix Node.js-specific deployment issues, configure Fly.io, and get your app live. From $19.
Node.js issues we fix before deploying
Common Node.js problems that affect Fly.io deployments.
No input validation
Request bodies and query parameters accepted without validation, enabling injection attacks and unexpected data types.
Missing rate limiting
No rate limiting on auth endpoints, API routes, or resource-intensive operations, enabling brute-force and DoS attacks.
Unhandled async errors
Unhandled promise rejections crash the Node.js process in production, taking the entire server down.
Memory leaks
Event listeners not cleaned up, growing arrays/maps, and unclosed connections that gradually consume all available memory.
Fly.io deployment issues we check for
Common Fly.io problems that break Node.js apps in production.
Dockerfile missing or misconfigured
Fly.io requires a Dockerfile for deployment. AI tools that scaffold without one force flyctl to auto-generate a suboptimal Dockerfile that misses build steps.
Volume only available in a single region
Fly volumes are pinned to one region. Multi-region deployments try to access a volume that doesn't exist in other regions, causing crashes.
Machine restarts losing in-memory state
AI-generated apps store session data or caches in memory. Fly machines can restart or migrate, wiping all in-memory state without warning.
Internal DNS resolution failing between services
Services within a Fly organization communicate via <app>.internal hostnames, but AI-generated code hardcodes localhost or public URLs.
Start with a self-serve audit
Get a professional review of your Node.js project before deploying to Fly.io.
External Security Scan
Black-box review of your public-facing app. No code access needed.
- OWASP Top 10 vulnerability check
- SSL/TLS configuration analysis
- Security header assessment
- Expert review within 24h
Code Audit
In-depth review of your source code for security, quality, and best practices.
- Security vulnerability analysis
- Code quality review
- Dependency audit
- Architecture review
- Expert + AI code analysis
Complete Bundle
Both scans in one package with cross-referenced findings.
- Everything in both products
- Cross-referenced findings
- Unified action plan
100% credited toward any paid service. Start with an audit, then let us fix what we find.
How it works
Tell us about your app
Share your project details and what you need help with.
Expert + AI audit
A human expert assisted by AI reviews your code within 24 hours.
Launch with confidence
We fix what needs fixing and stick around to help.
Frequently asked questions
How do I deploy a Node.js app to Fly.io?
We handle Node.js deployments to Fly.io end to end. Start with our code audit ($19) to identify deployment blockers specific to your Node.js project, then we configure Fly.io, fix issues, and get your app live in production.
What Node.js issues affect Fly.io deployments?
Node.js projects commonly have no input validation and missing rate limiting. On Fly.io, these combine with dockerfile missing or misconfigured and volume only available in a single region to cause deployment failures.
Can SpringCode deploy my Node.js project to Fly.io?
Yes. We specialize in deploying Node.js applications to Fly.io. We audit your codebase for Node.js-specific issues, configure Fly.io correctly, and handle the full deployment so your app runs reliably in production.
What does Node.js deployment to Fly.io cost?
Our code audit ($19) identifies all Fly.io deployment blockers in your Node.js project. Full deployment assistance is scoped with a fixed quote after the audit — no hourly billing or surprise charges.
Related resources
Other techs on Fly.io
Deploy Node.js elsewhere
Need help deploying Node.js to Fly.io?
Tell us about your project. We'll respond within 24 hours with a clear plan and fixed quote.