Simple docker file setup for node server

docker-compose.yml

version: "3"
services:
    server:
        build: .
        volumes:
            - .:/app
            - /app/node_modules
        ports:
            - "3000:3000"

Dockerfile

# create a file named Dockerfile
FROM node:alpine

WORKDIR /app

COPY package.json yarn.lock ./
RUN yarn install --production

COPY . ./
EXPOSE 3000
CMD ["npm", "start"]