Docker nodejs mongodb

Question

i will docker my app js. I run the order docker-compose up. But i have error : app | /bin/sh: 1: [: “npm”,: unexpected operator.

Dockerfile

FROM node:latest 
RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app
COPY package.json /usr/src/app/
RUN npm install
COPY . /usr/src/app
EXPOSE 3000
RUN ["npm", "start" ]

docker-compose.yml

version: "2"
services:
app:
  container_name: app
  restart: always
  build: .
  ports:
    - "3000:3000"
  links:
    - mongo
mongo:
  container_name: mongo
  image: mongo
  volumes:
    - ./data:/data/db
  ports:
    - "27017:27017"

Answer 1

Double-check your Dockerfile.

"npm" is different from “npm”, notice the double quote " and “. You should always use " (input from your keyboard) rather than “

then run the following command:

docker-compose up --build

Answer 2

You could use the CMD instruction instead of RUN.

Change this line:

RUN ["npm", "start"]

...to this:

CMD ["npm", "start"]

The CMD instruction is triggered when your container starts.

Docs here: https://docs.docker.com/engine/reference/builder/#cmd

I hope this helps.