We are experiencing a critical deployment block. Railway fails to detect a Dockerfile located in a monorepo subdirectory, even when the Root Directory setting is correctly configured.

This appears to be a Railway platform bug, as the exact same Dockerfile builds correctly when moved to the repository root.

Repository and Service

• Repository: https://github.com/atbreb/taylor-yves
• Service: Kong API Gateway
• Project / Service ID: [Please fill in from your dashboard]

The Core Problem

We have a service with its Dockerfile at apps/kong/Dockerfile.

Failing Configuration

• Root Directory: apps/kong
• Expected: Railway detects Dockerfile in the root (apps/kong/).
• Actual Error: Dockerfile 'Dockerfile' does not exist

Working "Workaround" Configuration

• Branch: railway-kong-root-workaround (Commit: 90b9c6e)
• Action: Moved apps/kong/Dockerfile to the repository root (/Dockerfile).
• Root Directory: (empty)
• Result: This works. The Dockerfile is detected, and the build starts.

This test confirms the Dockerfile itself is valid, and the issue is specific to Railway's detection within the apps/kong subdirectory.

Core Questions

1. Why does Railway fail to detect apps/kong/Dockerfile when the Root Directory is set to apps/kong?
2. Why did Dockerfile detection work for apps/web and apps/api subdirectories, but not for apps/kong?
3. Is there a known bug or a specific configuration we are missing for this monorepo structure?

Any help is appreciated. Thanks in advance.