subh05sus updated the backend build script to run prisma generate before compiling and enhanced the docs with step-by-step guidance on applying migrations, building the service, and deploying to production.

chore: update build process and enhance documentation for Prisma usage - Modified the build script in package.json to include 'prisma generate' for automatic client generation. - Expanded documentation on applying Prisma migrations and building the backend, clarifying steps for production deployments. - subh05sus/sparkmentor