can you provide us the reason for it's failure? without any errors it would be near impossible for us to help.

Dockerfile:24

22 | # build phase

23 | COPY . /app/.

24 | >>> RUN --mount=type=cache,id=s/ node_modules/cache,target=/app/node_modules/.cache npm run build

25 |

26 |

ERROR: failed to solve: process "/bin/bash -ol pipefail -c npm run build" did not complete successfully: exit code: 2

Error: Docker build failed

that's only a tiny portion of the build logs and it does not contain any useful information, please attach your entire build logs, you may use this https://bookmarklets.up.railway.app/log-downloader/

please find above attached log

can you specify the tech stack used in this app?

Express and TypeScript

you have type errors that are preventing your app from building, please review your build logs and fix the type errors.

but i have test it fully on my local pc and on render.com and it works fine no error of sort thats why i came here asking im not sure is not coming from my app. as my app works fine even on render.com

during local development type errors are being ignored, render is also ignoring your type errors. Railway is not ignoring your type errors.