Many changes.

lib/api/db.ts

@@ -0,0 +1,11 @@
+import { PrismaClient } from "@prisma/client";
+
+const globalForPrisma = global as unknown as { prisma: PrismaClient };
+
+export const prisma =
+  globalForPrisma.prisma ||
+  new PrismaClient({
+    log: ["query"],
+  });
+
+if (process.env.NODE_ENV !== "production") globalForPrisma.prisma = prisma;