fix: 修复 Vercel 部署 404 和 Swagger 无法访问

- vercel.json: builds.src 从 package.json 改为 api/index.ts，routes.dest 从 /dist/api/index.js 改为 /api
- api/index.ts: 修正 require 路径，移除多余的 src/ 前缀
- api/index.ts: Swagger 挂载路径从 /api 改为 /docs，避免与 Vercel 函数路径冲突
- package.json: 添加 vercel-build 脚本确保部署前编译 NestJS

api/index.ts

@@ -13,12 +13,12 @@ async function bootstrap() {
     const expressApp = express();
 
     // 使用 require 动态加载编译后的模块（避免 TypeScript 编译时检查）
-    const { AppModule } = require('../dist/src/app.module');
+    const { AppModule } = require('../dist/app.module');
 
     const app = await NestFactory.create(
       AppModule,
       new ExpressAdapter(expressApp),
-      { logger: ['error', 'warn', 'log'] }
+      { logger: ['error', 'warn', 'log'] },
     );
 
     // 配置 CORS
@@ -38,8 +38,12 @@ async function bootstrap() {
 
     // 尝试加载全局过滤器和拦截器
     try {
-      const { HttpExceptionFilter } = require('../dist/src/common/filters/http-exception.filter');
-      const { TransformInterceptor } = require('../dist/src/common/interceptors/transform.interceptor');
+      const {
+        HttpExceptionFilter,
+      } = require('../dist/common/filters/http-exception.filter');
+      const {
+        TransformInterceptor,
+      } = require('../dist/common/interceptors/transform.interceptor');
       app.useGlobalFilters(new HttpExceptionFilter());
       app.useGlobalInterceptors(new TransformInterceptor());
     } catch (error) {
@@ -67,7 +71,7 @@ async function bootstrap() {
       .addBearerAuth()
       .build();
     const document = SwaggerModule.createDocument(app, config);
-    SwaggerModule.setup('api', app, document);
+    SwaggerModule.setup('docs', app, document);
 
     await app.init();
     cachedApp = expressApp;
@@ -88,7 +92,7 @@ export default async function handler(req: any, res: any) {
     res.status(500).json({
       error: 'Internal Server Error',
       message: error.message,
-      stack: process.env.NODE_ENV === 'development' ? error.stack : undefined
+      stack: process.env.NODE_ENV === 'development' ? error.stack : undefined,
     });
   }
 }

package.json

@@ -20,7 +20,8 @@
     "test:watch": "jest --watch",
     "test:cov": "jest --coverage",
     "test:debug": "node --inspect-brk -r tsconfig-paths/register -r ts-node/register node_modules/.bin/jest --runInBand",
-    "test:e2e": "jest --config ./test/jest-e2e.json"
+    "test:e2e": "jest --config ./test/jest-e2e.json",
+    "vercel-build": "npx nest build"
   },
   "dependencies": {
     "@nestjs/cache-manager": "2.1.0",

vercel.json

@@ -2,14 +2,14 @@
   "version": 2,
   "builds": [
     {
-      "src": "package.json",
+      "src": "api/index.ts",
       "use": "@vercel/node"
     }
   ],
   "routes": [
     {
       "src": "/(.*)",
-      "dest": "/dist/api/index.js"
+      "dest": "/api"
     }
   ]
 }