Express

.dockerignore

node_modules

docker-compose.yml

version: '3.7'

services:
    app:
        image: node:12-alpine
        depends_on:
            - mysql
        command: sh -c "yarn install && yarn run dev"
        ports:
            - 3000:3000
        working_dir: /app
        volumes:
            - ./:/app
        environment:
            MYSQL_HOST: mysql
            MYSQL_USER: root
            MYSQL_PASSWORD: secret
            MYSQL_DB: todos

    mysql:
        image: mysql:5.7
        volumes:
            - todo-mysql-data:/var/lib/mysql
        environment:
            MYSQL_ROOT_PASSWORD: secret
            MYSQL_DATABASE: todos

volumes:
    todo-mysql-data:

Dockerfile

FROM node:12-alpine
WORKDIR /app
COPY package.json yarn.lock ./
RUN yarn install --production
COPY . .
CMD ["node", "src/index.js"]