I’m running n8n on Railway (Primary + Worker + Postgres + Redis, using queue mode) and wanted to customize the Dockerfile to add tools like curl and ffmpeg.

After switching from the default n8nio/n8n image to a custom Dockerfile (as suggested in the docs), I ran into problems:

Login fails with column User.apiKey does not exist

Looks like migrations aren’t running

Redis sometimes fails to connect in Worker mode

When I don’t use a Dockerfile (Railway default), everything works fine.

My Questions:
Do both Primary and Worker need the Dockerfile separately?( change it from settings->Deployments)

Can I use one Dockerfile for both and control behavior via N8N_ROLE?

How do I make sure n8n migrate:up runs in Primary?

Why does login break after switching to Docker?

Would love a clear example or best practice for custom Docker on Railway. Thanks!