Fix Docker build: Install prisma in runner stage to resolve prisma/config module

Dockerfile

@@ -26,6 +26,7 @@ COPY --from=builder /app/.next/static ./.next/static
 COPY --from=builder /app/public ./public
 COPY --from=builder /app/prisma ./prisma
 COPY --from=builder /app/prisma.config.ts ./
+RUN npm install prisma@^7.8.0
 COPY docker-entrypoint.sh ./
 RUN chmod +x docker-entrypoint.sh && chown -R appuser:appuser /app
 USER appuser