Enable users to create custom video playlists and save favorite videos

Adds database schemas and Drizzle ORM setup for user playlists and favorites features.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: aa92e7e2-ec62-4c92-b21b-02ef78a664c2
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/8cc42625-c1f5-4e43-99bd-77f2c4dedee2/aa92e7e2-ec62-4c92-b21b-02ef78a664c2/Xt4Awd6

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 });