Deploy your React app to Fly.io
Step-by-step deployment help for React apps on Fly.io. We fix React-specific deployment issues, configure Fly.io, and get your app live. From $19.
React issues we fix before deploying
Common React problems that affect Fly.io deployments.
XSS via dangerouslySetInnerHTML
AI tools use dangerouslySetInnerHTML to render dynamic content without sanitization, allowing script injection.
Exposed environment variables
Sensitive keys placed in NEXT_PUBLIC_ or REACT_APP_ prefixed variables, making them visible in the browser bundle.
Unnecessary re-renders
Missing React.memo, useMemo, and useCallback cause components to re-render on every parent update, degrading performance.
Unhandled promise rejections
Async operations in useEffect without proper error handling crash silently or show raw error messages.
Fly.io deployment issues we check for
Common Fly.io problems that break React 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 React 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 React app to Fly.io?
We handle React deployments to Fly.io end to end. Start with our code audit ($19) to identify deployment blockers specific to your React project, then we configure Fly.io, fix issues, and get your app live in production.
What React issues affect Fly.io deployments?
React projects commonly have xss via dangerouslysetinnerhtml and exposed environment variables. 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 React project to Fly.io?
Yes. We specialize in deploying React applications to Fly.io. We audit your codebase for React-specific issues, configure Fly.io correctly, and handle the full deployment so your app runs reliably in production.
What does React deployment to Fly.io cost?
Our code audit ($19) identifies all Fly.io deployment blockers in your React 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 React elsewhere
Need help deploying React to Fly.io?
Tell us about your project. We'll respond within 24 hours with a clear plan and fixed quote.