Marking this under review - we're going into planning soon. If you're interested in this feature, please upvote the thread!

I actually added this yesterday and it'll be in the changelog this week!

Set RAILWAY_DEPLOYMENT_DRAINING_SECONDS and it'll send a SIGTERM, wait that amount of time, and then send a SIGKILL :)

EDIT: For node you MUST invoke node start directly from Docker. “npm run start” will swallow this signal.