Add Prisma support to Docker build:
- Run 'prisma generate' during Docker build
- Copy Prisma client and schema to production image
- Remove 'prisma db push' from build script (runs at startup)
- Enable Next.js standalone output mode
- Add db-setup.sh script for runtime migrations
This fixes the deployment failure where Prisma wasn't available.
Co-authored-by: Cursor <cursoragent@cursor.com>
