Without prisma.config.ts in the runner stage, prisma db push has no
datasource URL (schema.prisma no longer carries url in Prisma 7) and
silently skips creating the database. Also add set -e to the entrypoint
so any db push failure is visible in logs and stops the container.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>