How to set the listening address for a Shopify Remix project?

Topic summary

A deployment issue occurs when hosting a Shopify Remix project on fly.io. The application fails to listen on the expected address (0.0.0.0:8081), making it unreachable by fly-proxy.

Root Cause:

  • The app is likely listening on 127.0.0.1 (localhost) instead of 0.0.0.0
  • fly.io’s proxy requires apps to listen on 0.0.0.0 to be accessible

Current Status:

  • The original poster seeks guidance on how to configure the listening address in a Shopify Remix project
  • Multiple users have reported experiencing the same issue
  • No solution has been provided yet - the discussion remains unresolved with several participants waiting for help
Summarized with AI on October 31. AI used: claude-sonnet-4-5-20250929.

Did you solved it ? I am also stuck in it