Update database connection to use the standard pg driver

Replaced `@neondatabase/serverless` with `pg` for database connections in `server/db.ts`, updating the `drizzle` initialization accordingly.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ae4037a0-2a6f-4530-9bac-79b543286bda
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/397bca8c-984f-43ff-841a-10897aeb8140/ae4037a0-2a6f-4530-9bac-79b543286bda/Yxw6kHP

server/db.ts

@@ -1,10 +1,7 @@
-import { Pool, neonConfig } from '@neondatabase/serverless';
-import { drizzle } from 'drizzle-orm/neon-serverless';
-import ws from "ws";
+import { Pool } from 'pg';
+import { drizzle } from 'drizzle-orm/node-postgres';
 import * as schema from "@shared/schema";
 
-neonConfig.webSocketConstructor = ws;
-
 if (!process.env.DATABASE_URL) {
   throw new Error(
     "DATABASE_URL must be set. Did you forget to provision a database?",
@@ -12,4 +9,4 @@ if (!process.env.DATABASE_URL) {
 }
 
 export const pool = new Pool({ connectionString: process.env.DATABASE_URL });
-export const db = drizzle({ client: pool, schema });
+export const db = drizzle(pool, { schema });