edr-platform/apps/edr-gps-tracker/src/main.ts

import "reflect-metadata";
import * as dotenv from "dotenv";
dotenv.config();
import { Logger } from "@nestjs/common";
import { NestFactory } from "@nestjs/core";

import { AppModule } from "./app.module";

/**
 * 
 * Standalone GT06 GPS ingester. Boots a Nest application context (NO HTTP
 * server) so only the DB connection and Gt06Server come up; the TCP listener
 * binds from Gt06Server.onApplicationBootstrap. The /gps REST API lives in
 * @edr/freight-api, which reads the same tables this process writes.
 */
async function bootstrap() {
  const logger = new Logger("gps-tracker");
  const port = Number(process.env.GT06_TCP_PORT ?? 5023);
  if (!port) {
    logger.error(
      "GT06_TCP_PORT=0 disables the listener — this process would idle. Set a port.",
    );
    process.exit(1);
  }

  const app = await NestFactory.createApplicationContext(AppModule);
  app.enableShutdownHooks();
  logger.log(
    `GT06 ingester up — TCP ${process.env.GT06_TCP_HOST ?? "0.0.0.0"}:${port}`,
  );
}

void bootstrap();