'Error: Cannot find module '/app/backend/src/main.js' when I used heroku

[DongGyu123]

Select Topic Area

Question

Body

Hello, I want to distribute my web to a server by using the heroku. But I have an error when I typed 'git push heroku main', 'heroku ps:scale web=1 --app "dotg"', and** 'heroku open'**.
I couldn't enter my web page, so I typed **'heroku logs --tail' **in my terminal, and then I could find the error below.

2024-05-01T11:29:06.753405+00:00 heroku[web.1]: Starting process with command `npm start`
2024-05-01T11:29:07.934436+00:00 app[web.1]:
2024-05-01T11:29:07.934502+00:00 app[web.1]: > start
2024-05-01T11:29:07.934503+00:00 app[web.1]: > node backend/src/main.ts
2024-05-01T11:29:07.934503+00:00 app[web.1]:
2024-05-01T11:29:07.962737+00:00 app[web.1]: (node:21) Warning: To load an ES module, set "type": "module" in the package.json or use the .mjs extension.
2024-05-01T11:29:07.962739+00:00 app[web.1]: (Use `node --trace-warnings ...` to show where the warning was created)     
2024-05-01T11:29:07.964271+00:00 app[web.1]: /app/backend/src/main.ts:1
2024-05-01T11:29:07.964271+00:00 app[web.1]: import { NestFactory } from '@nestjs/core';
2024-05-01T11:29:07.964272+00:00 app[web.1]: ^^^^^^
2024-05-01T11:29:07.964272+00:00 app[web.1]:
2024-05-01T11:29:07.964272+00:00 app[web.1]: SyntaxError: Cannot use import statement outside a module
2024-05-01T11:29:07.964273+00:00 app[web.1]: at internalCompileFunction (node:internal/vm:128:18)
2024-05-01T11:29:07.964273+00:00 app[web.1]: at wrapSafe (node:internal/modules/cjs/loader:1280:20)
2024-05-01T11:29:07.964273+00:00 app[web.1]: at Module._compile (node:internal/modules/cjs/loader:1332:27)
2024-05-01T11:29:07.964273+00:00 app[web.1]: at Module._extensions..js (node:internal/modules/cjs/loader:1427:10)        
2024-05-01T11:29:07.964276+00:00 app[web.1]: at Module.load (node:internal/modules/cjs/loader:1206:32)
2024-05-01T11:29:07.964276+00:00 app[web.1]: at Module._load (node:internal/modules/cjs/loader:1022:12)
2024-05-01T11:29:07.964277+00:00 app[web.1]: at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:135:12)
2024-05-01T11:29:07.964277+00:00 app[web.1]: at node:internal/main/run_main_module:28:49
2024-05-01T11:29:07.964279+00:00 app[web.1]:
2024-05-01T11:29:07.964280+00:00 app[web.1]: Node.js v20.12.2
2024-05-01T11:29:08.029537+00:00 heroku[web.1]: Process exited with status 1
2024-05-01T11:29:08.051961+00:00 heroku[web.1]: State changed from starting to crashed
2024-05-01T11:30:17.745474+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=dotg-00dfc29d9468.herokuapp.com request_id=60624a63-61a7-4730-9d12-c8bb0969d693 fwd="203.230.52.4" dyno= connect= service= status=503 bytes= protocol=https
2024-05-01T11:30:18.136633+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=dotg-00dfc29d9468.herokuapp.com request_id=cbe37d57-415a-46b4-b03a-a44a30eb650c fwd="203.230.52.4" dyno= connect= service= status=503 bytes= protocol=https

Please help me to fix this error.

this is my web folder

{
  "type": "module",
  "dependencies": {
    "@nestjs-modules/mailer": "^1.10.3",
    "@nestjs/config": "^3.1.1",
    "@nestjs/mongoose": "^10.0.2",
    "class-transformer": "^0.5.1",
    "class-validator": "^0.14.0",
    "mongodb": "^6.3.0",
    "mongoose": "^8.0.1",
    "nodemailer": "^6.9.8"
  },
  "scripts": {
    "start": "node backend/src/main.ts"
  },
  "devDependencies": {
    "ts-node": "^10.9.2"
  }
}

This is my DotG_Back\package.json code.

{
  "name": "project",
  "version": "0.0.1",
  "description": "",
  "author": "",
  "private": true,
  "license": "UNLICENSED",
  "scripts": {
    "build": "nest build",
    "format": "prettier --write \"src/**/*.ts\" \"test/**/*.ts\"",
    "start": "nest start",
    "start:dev": "nest start --watch",
    "start:debug": "nest start --debug --watch",
    "start:prod": "node dist/main",
    "lint": "eslint \"{src,apps,libs,test}/**/*.ts\" --fix",
    "test": "jest",
    "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"
  },
  "dependencies": {
    "@nestjs/common": "^10.0.0",
    "@nestjs/core": "^10.0.0",
    "@nestjs/jwt": "^10.2.0",
    "@nestjs/mongoose": "^10.0.2",
    "@nestjs/passport": "^10.0.2",
    "@nestjs/platform-express": "^10.0.0",
    "@nestjs/swagger": "^7.1.16",
    "bcrypt": "^5.1.1",
    "mongoose": "^6.12.3",
    "nodemailer": "^6.9.10",
    "passport": "^0.6.0",
    "passport-jwt": "^4.0.1",
    "passport-local": "^1.0.0",
    "reflect-metadata": "^0.1.13",
    "rxjs": "^7.8.1",
    "swagger-ui-express": "^5.0.0"
  },
  "devDependencies": {
    "@nestjs/cli": "^10.0.0",
    "@nestjs/schematics": "^10.0.0",
    "@nestjs/testing": "^10.0.0",
    "@types/bcrypt": "^5.0.2",
    "@types/express": "^4.17.17",
    "@types/jest": "^29.5.2",
    "@types/node": "^20.3.1",
    "@types/nodemailer": "^6.4.14",
    "@types/passport-local": "^1.0.38",
    "@types/supertest": "^2.0.12",
    "@typescript-eslint/eslint-plugin": "^6.0.0",
    "@typescript-eslint/parser": "^6.0.0",
    "eslint": "^8.42.0",
    "eslint-config-prettier": "^9.0.0",
    "eslint-plugin-prettier": "^5.0.0",
    "jest": "^29.5.0",
    "prettier": "^3.0.0",
    "source-map-support": "^0.5.21",
    "supertest": "^6.3.3",
    "ts-jest": "^29.1.0",
    "ts-loader": "^9.4.3",
    "ts-node": "^10.9.1",
    "tsconfig-paths": "^4.2.0",
    "typescript": "^5.1.3"
  },
  "jest": {
    "moduleFileExtensions": [
      "js",
      "json",
      "ts"
    ],
    "rootDir": "src",
    "testRegex": ".*\\.spec\\.ts$",
    "transform": {
      "^.+\\.(t|j)s$": "ts-jest"
    },
    "collectCoverageFrom": [
      "**/*.(t|j)s"
    ],
    "coverageDirectory": "../coverage",
    "testEnvironment": "node"
  }
}

This is my DotG_Back\backend\package.json

import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';
import { ValidationPipe } from '@nestjs/common';

async function bootstrap() {
  const app = await NestFactory.create(AppModule);
  app.useGlobalPipes(new ValidationPipe()); 
  app.enableCors({ 
    origin: true,
    credentials: true
  });

  const PORT = process.env.PORT;
  await app.listen(PORT);
}

bootstrap();

This is my DotG_Back\backend\src\main.ts code

And here's my heroku app setting. Pleas help..!

[LiteBrite82]

Thanks for posting in the GitHub Community, @DongGyu123 !

We're happy you're here. You are more likely to get a useful response if you are posting your question in the applicable category, the Code Search and Navigation category is solely related to conversations around the GitHub product "Code Search and Navigation. This question should be in the "Programming Help" category. I've gone ahead and moved it for you. Good luck!