feat: 后端实现items增删改查

apps/backend/src/lib/prisma.ts

@@ -0,0 +1,9 @@
+import { PrismaPg } from '@prisma/adapter-pg';
+import { PrismaClient } from '../../generated/prisma/client';
+
+const connectionString = `${process.env.DATABASE_URL}`
+
+const adapter = new PrismaPg({ connectionString })
+const prisma = new PrismaClient({ adapter })
+
+export { prisma }