Node.js + MongoDB + Docker

docker-compose.yml

version: '3'

services:
  app:
    build: .
    container_name: app
    restart: always
    ports:
      - '8001:8001'
    depends_on:
      - mongodb
    environment:
      WAIT_HOSTS: mongodb:27017

  mongodb:
    container_name: mongodb
    image: mongo:4.2-bionic
    restart: always
    volumes:
      - /data/db:/data/db
    ports:
      - '27017:27017'
    env_file: .env
    environment:
      - MONGO_INITDB_ROOT_USERNAME=$MONGO_USER
      - MONGO_INITDB_ROOT_PASSWORD=$MONGO_PASS

Dockerfile

FROM node:12-alpine

WORKDIR /usr/src/app

COPY package*.json ./
RUN npm install

COPY . ./
RUN npm run build

ADD https://github.com/ufoscout/docker-compose-wait/releases/download/2.6.0/wait /usr/src/wait
RUN chmod +x /usr/src/wait

EXPOSE 8001
CMD /usr/src/wait && node dist/index.js

Makefile

build:
	rm -rf dist && tsc && gcloud builds submit --tag gcr.io/${projectId}/${module}

deploy:
	gcloud run deploy ${module} --image gcr.io/${projectId}/${module} --platform managed --region asia-northeast1

bad:
	make build && make deploy

mongodb.ts

import mongoose from 'mongoose'

function connect() {
  const user = process.env.MONGO_USER || ''
  const pass = process.env.MONGO_PASS || ''
  const host = process.env.MONGO_HOST || ''
  const port = process.env.MONGO_PORT || ''
  const db = process.env.MONGO_DB || ''
  mongoose
    .connect(`mongodb://${user}:${pass}@${host}:${port}/${db}`, {
      useNewUrlParser: true,
      useUnifiedTopology: true,
      useCreateIndex: true,
    })
    .then(() => {
      console.log(`🚀 MongoDB Started`)
    })
    .catch(err => {
      console.log(err)
    })

  mongoose.connection.on('error', err => {
    console.log(err)
  })
}

export default {
  connect,
}