version: '3.9'

services:
  mongodb:
    container_name: mongodb
    image: mongo
    restart: always
    ports:
      - 27017:27017
    volumes:
        - ./db:/data/db
        - ./bin/mongo-init.sh:/docker-entrypoint-initdb.d/init.sh
    environment:
      MONGO_INITDB_ROOT_USERNAME: root
      MONGO_INITDB_ROOT_PASSWORD: root
      MONGO_INITDB_DATABASE: sample
      MONGO_USERNAME: username
      MONGO_PASSWORD: password
    networks:
      - sample

  mongo-express:
    container_name: mongo-express
    image: mongo-express
    restart: always
    ports:
      - 8081:8081
    environment:
      ME_CONFIG_MONGODB_ADMINUSERNAME: root
      ME_CONFIG_MONGODB_ADMINPASSWORD: root
      ME_CONFIG_MONGODB_URL: mongodb://root:root@mongodb:27017/
    networks:
      - sample


networks:
  sample:

mongosh --port 27017 --authenticationDatabase -u "$MONGO_INITDB_ROOT_USERNAME" -p "$MONGO_INITDB_ROOT_PASSWORD"  <<EOF
  use admin
  db.createUser({
     user: process.env.MONGO_USERNAME ,
     pwd: process.env.MONGO_PASSWORD ,
     roles: [{ 
        role: 'readWrite',
        db: process.env.MONGO_INITDB_DATABASE
      }]
   })
EOF

$ docker-compose up -d

$ npm i mongodb dotenv
$ npm i -D ts-node typescript nodemon

"scripts": {
  "start": "nodemon src/index.ts"
},

MONGO_USERNAME=username
MONGO_PASSWORD=password
MONGO_DB=sample
MONGO_DB_COLLECTION=sample-table
MONGO_HOST=127.0.0.1
MONGO_PORT=27017

require('dotenv').config()
import { MongoClient, MongoClientOptions } from 'mongodb';

let URI = `mongodb://${process.env.MONGO_HOST}:${process.env.MONGO_PORT}`;
let DB = process.env.MONGO_DB;

let option: MongoClientOptions = {
  auth: {
    username: process.env.MONGO_USERNAME,
    password: process.env.MONGO_PASSWORD,
  },
  authSource: DB,
};

// 建立 MongoClient
const client = new MongoClient(URI, option);

let main = async () => {
  // 連線
  await client.connect();
  console.log('Connected successfully to server');

  return 'done.';

};
main()
  .then(console.log)
  .catch(console.error)
  .finally(() => {
    // 中斷連線
    client.close()
  }); 

// 略...
interface Book {
    name: string
    author: string
}
let main = async () => {
  await client.connect();
  const database = client.db(DB);
  const bookCollenction: Collection<Book> = database.collection<Book>('book');
  return 'done.';
};
// 略...