helix-engage-server/src/main.ts

import { NestFactory } from '@nestjs/core';
import type { NestExpressApplication } from '@nestjs/platform-express';
import { join } from 'path';
import { AppModule } from './app.module';
import { ConfigService } from '@nestjs/config';

async function bootstrap() {
    const app = await NestFactory.create<NestExpressApplication>(AppModule);
    const config = app.get(ConfigService);

    app.enableCors({
        origin: config.get('corsOrigin'),
        credentials: true,
    });

    // Serve widget.js and other static files from /public
    // In dev mode __dirname = src/, in prod __dirname = dist/ — resolve from process.cwd()
    app.useStaticAssets(join(process.cwd(), 'public'), {
        setHeaders: (res, path) => {
            if (path.endsWith('.js')) {
                res.setHeader('Cache-Control', 'public, max-age=3600');
                res.setHeader('Access-Control-Allow-Origin', '*');
            }
        },
    });

    const port = config.get('port');
    await app.listen(port);
    console.log(`Helix Engage Server running on port ${port}`);
}
bootstrap();