Deploy a Node Js App to DigitalOcean Droplet with Docker

README.md

Deploy a Node Js App to DigitalOcean Droplet with Docker

create_node_app.sh

mkdir digital-ocean

cd digital-ocean

npm init

npm install express

npm start

docker_build.sh

docker build . -t digital-ocean-app

docker run -p 3000:3000 digital-ocean-app

# Publish

docker tag digital-ocean-app <USER_NAME>/digital-ocean-app

docker tag digital-ocean-app <USER_NAME>/digital-ocean-app:<VERSION> # dev, staging, prod

docker login

docker push <USER_NAME>/digital-ocean-app:<OPTIONAL_VERSION>

Dockerfile

FROM node:13-alpine

WORKDIR /user/src/app

COPY package*.json ./

RUN npm install

COPY . .

EXPOSE 3000

CMD [ "npm", "start" ]

index.js

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

app.get('/status', (req, res) => res.send({status: "I'm alive!"}))

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

package.json

{
  "name": "digital-ocean",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "start": "node index.js",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC"
}

run_docker_image.sh

ssh -i ~/.ssh/digital-ocean-key root@<IP_ADDRESS>

# docker login

docker run -p 3000:3000 <DOCKER_USER_NAME>/digital-ocean-app:<OPTIONAL_TAG>

ssh_key_generate.sh

ssh-keygen -t rsa -b 4096

# digital-ocean-key

cat digital-ocean-key.pub