Npm ERR! enoent Could not read package.json: Error: ENOENT: no such fi le or directory, open '/package.json'

Docker Engine Compose
13

Hi,
Problem solved.
I created a www directory and moved package.json and index.js into it.
I modified the package.json file as follows:

{
  "name": "nodejs-app",
  "dependencies": {
    "express": "^4.17.0"
  },
  "scripts": {
    "start": "node index.js"
  }
}

I also modified the Dockerfile as below:

FROM node:latest

RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app

COPY ./www/package.json /usr/src/app/package.json
RUN npm install
RUN npm update

COPY ./www /usr/src/app
EXPOSE 3000

The YAML file is as follows:

version: '3.9'
services:
    nodejs:
      container_name: Node
      build:
         context: .
         dockerfile: Dockerfile
      command: npm start
      volumes:
        - ./www:/usr/src/app
      expose:
        - "3000"

Finally:

Node  |
Node  | > docker-nodejs@1.0.0 start
Node  | > node index.js
Node  |
Node  | server running on 3000