fix: update Dockerfile and fix duplicate imports

Dockerfile

@@ -3,8 +3,8 @@ FROM oven/bun:1.1 as base
 WORKDIR /app
 
 # Install dependencies first (better layer caching)
-COPY package.json bun.lock ./
-RUN bun install --frozen-lockfile
+COPY package.json ./
+RUN bun install
 
 # Copy all source files
 COPY . .

index.ts

@@ -2,14 +2,10 @@ import { WebhookServer } from './src/server';
 
 console.log("Starting WhatsApp Task Bot...");
 try {
-  WebhookServer.start();
+  const server = WebhookServer.start();
   console.log("Server started successfully");
+  export default server;
 } catch (error) {
   console.error("Failed to start server:", error);
   process.exit(1);
 }
-import { WebhookServer } from './src/server';
-
-const server = WebhookServer.start();
-
-export default server;