Implement secure user authentication with role-based access control

Integrates user authentication using bcrypt, session management with PostgreSQL, and role-based access control for enhanced security and user management.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 91318273-c764-4fd4-be04-bdc12c38af32
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/0715008c-7244-40f4-befc-26c014852236/ab880d72-1a34-4d36-b5be-9f44df85ed1a.jpg

server/db.ts

@@ -0,0 +1,15 @@
+import { Pool, neonConfig } from '@neondatabase/serverless';
+import { drizzle } from 'drizzle-orm/neon-serverless';
+import ws from "ws";
+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?",
+  );
+}
+
+export const pool = new Pool({ connectionString: process.env.DATABASE_URL });
+export const db = drizzle({ client: pool, schema });