Align backend plan with codebase

lib/server/db.ts

@@ -0,0 +1,16 @@
+import { PrismaClient } from "@prisma/client";
+
+const globalForPrisma = globalThis as unknown as { prisma: PrismaClient | undefined };
+
+export const prisma =
+  globalForPrisma.prisma ??
+  new PrismaClient({
+    log:
+      process.env.NODE_ENV === "development"
+        ? ["query", "error", "warn"]
+        : ["error"],
+  });
+
+if (process.env.NODE_ENV !== "production") {
+  globalForPrisma.prisma = prisma;
+}