Fix Docker deployment by resolving module resolution errors

Update build process and imports to ensure Node.js ESM compatibility for Docker deployments, addressing ERR_MODULE_NOT_FOUND errors by separating server compilation and adding .js extensions to all relative imports.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ceced2fc-aa46-458d-ba87-ddd4b7bb1518
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/659922a9-0087-461c-90dd-6d9a58b81d4d/ceced2fc-aa46-458d-ba87-ddd4b7bb1518/SBF5OKZ

server/routes.ts

@@ -1,7 +1,7 @@
 import type { Express } from "express";
 import { createServer, type Server } from "http";
-import { storage } from "./storage";
-import { insertLabelSchema, insertTaskSchema } from "@shared/schema";
+import { storage } from "./storage.js";
+import { insertLabelSchema, insertTaskSchema } from "../shared/schema.js";
 
 export async function registerRoutes(app: Express): Promise<Server> {
   // Health check endpoint