一步步使用Docker設定Node.js

const express = require('express')
const app = express()
const port = 3000

app.get('/', (req, res) => res.send('Hello World!'))

app.listen(port, () => {console.log(`Example app listening on port ${port}!`))

version: "3"
services:
  app:
    container_name: app # How the container will appear when listing containers from the CLI
    image: node:10 # The <container-name>:<tag-version> of the container, in this case the tag version aligns with the version of node
    user: node # The user to run as in the container
    working_dir: "/app" # Where to container will assume it should run commands and where you will start out if you go inside the container
    networks:
    - app # Networking can get complex, but for all intents and purposes just know that containers on the same network can speak to each other
    ports:
    - "3000:3000" # <host-port>:<container-port> to listen to, so anything running on port 3000 of the container will map to port 3000 on our localhost
    volumes:
    - ./:/app # <host-directory>:<container-directory> this says map the current directory from your system to the /app directory in the docker container
    command: "node src/index.js" # The command docker will execute when starting the container, this command is not allowed to exit, if it does your container will stop

networks:
  app:

const path = require('path')

module.exports = {
  apps: [{
    name: 'app',
    script: 'src/index.js', // Your entry point
    instances: 1,
    autorestart: true, // THIS is the important part, this will tell PM2 to restart your app if it falls over
    max_memory_restart: '1G'
  }]
}

version: "3"
services:
  app:
    container_name: app # How the container will appear when listing containers from the CLI
    image: node:10 # The <container-name>:<tag-version> of the container, in this case the tag version aligns with the version of node
    user: node # The user to run as in the container
    working_dir: "/app" # Where to container will assume it should run commands and where you will start out if you go inside the container
    networks:
    - app # Networking can get complex, but for all intents and purposes just know that containers on the same network can speak to each other
    ports:
    - "3000:3000" # <host-port>:<container-port> to listen to, so anything running on port 3000 of the container will map to port 3000 on our localhost
    volumes:
    - ./:/app # <host-directory>:<container-directory> this says map the current directory from your system to the /app directory in the docker container
    command: "npx pm2 start ecosystem.config.js --no-daemon" # The command docker will execute when starting the container, this command is not allowed to exit, if it does your container will stop

networks:
  app:

module.exports = {
    apps: [{
        name: 'app',
        script: 'src/index.js',
        instances: 1,
        autorestart: true,
        watch: process.env.NODE_ENV !== 'production' ? path.resolve(__dirname, 'src') : false,
        max_memory_restart: '1G'
    }]
}