How to run your Koa app via docker

[joephon]

Dependencies

• Docker

• npm

Step 1 init project and write your koa code

mkdir koa && cd koa && vim app.js
npm i --save koa

// koa/app.js

const Koa = require('koa')
const app = new Koa()
const PORT = 3000

app.use((ctx) => {
  ctx.body = 'Hello World!'
})

app.listen(PORT, () => console.log(`Server is running  on port: ${PORT}`))

Step 2 write your Dockerfile

vim Dockerfile

// koa/Dockerfile

FROM node:latest
COPY . /app
WORKDIRE /app
RUN npm i
EXPOSE 3000
CMD node ./app.js

Step 3 build your docker file

docker build . 

Step 4 run your app

docker run -p 3000:3000 -d [your docker image id]

Bingo~

curl -get localhost:3000
// => Hello World!

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