I'm not super educated on this, but I'm pretty sure you need a start command in your package.json file like this:

"scripts": {
    "start": "node index.js"
  }

Then just replace node index.js with whatever you want your start command to be

If it’s in typescript, you’ll need something like tsx or tsc to interpret/compile the code into js.

Hey, the screenshot only shows that the deploy failed, not the real cause.
Open the failed deployment in Railway and check the logs – scroll to the bottom and copy the full error message. Most backend deploy failures are due to things like:

• the server not listening on Railway’s $PORT,

• a wrong start command or wrong folder being built, or

• missing dependencies/runtime in the Docker/Nixpacks image.

Share the log output here and we can point to the exact fix.