Prepare application for production deployment with Docker and PostgreSQL

Integrate PostgreSQL database support, add Docker deployment configurations, and implement health check endpoints.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ceced2fc-aa46-458d-ba87-ddd4b7bb1518
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/659922a9-0087-461c-90dd-6d9a58b81d4d/ceced2fc-aa46-458d-ba87-ddd4b7bb1518/ahHWEFX

server/db.ts

@@ -0,0 +1,46 @@
+import { drizzle } from 'drizzle-orm/neon-http';
+import { neon } from '@neondatabase/serverless';
+import * as schema from '@shared/schema';
+
+let db: ReturnType<typeof drizzle> | null = null;
+
+export function getDatabase() {
+  if (!db) {
+    const databaseUrl = process.env.DATABASE_URL;
+    
+    if (!databaseUrl) {
+      throw new Error('DATABASE_URL environment variable is not set');
+    }
+
+    const sql = neon(databaseUrl);
+    db = drizzle(sql, { schema });
+  }
+
+  return db;
+}
+
+export async function initializeDatabase() {
+  try {
+    const database = getDatabase();
+    
+    // Create default labels if they don't exist
+    const existingLabels = await database.select().from(schema.labels);
+    
+    if (existingLabels.length === 0) {
+      const defaultLabels = [
+        { name: "Work", color: "#3B82F6" },
+        { name: "Personal", color: "#10B981" },
+        { name: "Urgent", color: "#EF4444" },
+        { name: "Study", color: "#8B5CF6" },
+      ];
+      
+      await database.insert(schema.labels).values(defaultLabels);
+      console.log('✓ Created default labels');
+    }
+    
+    console.log('✓ Database initialized successfully');
+  } catch (error) {
+    console.error('Failed to initialize database:', error);
+    throw error;
+  }
+}