feat: initialize inventory management application with Prisma schema, QR scanning, and UI components

lib/prisma.js

@@ -0,0 +1,18 @@
+import { PrismaClient } from "@prisma/client";
+import { Pool } from "pg";
+import { PrismaPg } from "@prisma/adapter-pg";
+
+const connectionString = process.env.DATABASE_URL;
+
+const pool = new Pool({ connectionString });
+const adapter = new PrismaPg(pool);
+
+const prismaClientSingleton = () => {
+  return new PrismaClient({ adapter });
+};
+
+const globalForPrisma = globalThis;
+
+export const prisma = globalForPrisma.prisma ?? prismaClientSingleton();
+
+if (process.env.NODE_ENV !== "production") globalForPrisma.prisma = prisma;