title: No such file or directory : Docker-compose up
body: <p>I dockerized my mean application with docker-compose. This works fine. 
  Now I try to use "volumes" so that my angular app (with ng serve) and my express app (with nodemon.js) auto-restart when coding.
  But identical error appears for both angular and express container : </p>
  
  <pre><code>angular_1   |
  angular_1   | up to date in 1.587s
  angular_1   | found 0 vulnerabilities
  angular_1   |
  angular_1   | npm ERR! path /usr/src/app/package.json
  angular_1   | npm ERR! code ENOENT
  angular_1   | npm ERR! errno -2
  angular_1   | npm ERR! syscall open
  angular_1   | npm ERR! enoent ENOENT: no such file or directory, open '/usr/src/app/package.json'
  angular_1   | npm ERR! enoent This is related to npm not being able to find a file.
  angular_1   | npm ERR! enoent
  angular_1   |
  angular_1   | npm ERR! A complete log of this run can be found in:
  angular_1   | npm ERR!     /root/.npm/_logs/2019-04-07T20_51_38_933Z-debug.log
  harmonie_angular_1 exited with code 254
  </code></pre>
  
  <p>See my folder hierarchy :</p>
  
  <pre><code>-project
    -client
      -Dockerfile
      -package.json
    -server
      -Dockerfile
      -package.json
    -docker-compose.yml
  </code></pre>
  
  <p>Here's my Dockerfile for angular : </p>
  
  <pre><code># Create image based on the official Node 10 image from dockerhub
  FROM node:10
  
  # Create a directory where our app will be placed
  RUN mkdir -p /usr/src/app
  
  # Change directory so that our commands run inside this new directory
  WORKDIR /usr/src/app
  
  # Copy dependency definitions
  COPY package*.json /usr/src/app/
  
  # Install dependecies
  RUN npm install
  
  # Get all the code needed to run the app
  COPY . /usr/src/app/
  
  # Expose the port the app runs in
  EXPOSE 4200
  
  # Serve the app
  CMD ["npm", "start"]
  </code></pre>
  
  <p>My Dockerfile for express : </p>
  
  <pre><code># Create image based on the official Node 6 image from the dockerhub
  FROM node:6
  
  # Create a directory where our app will be placed
  RUN mkdir -p /usr/src/app
  
  # Change directory so that our commands run inside this new directory
  WORKDIR /usr/src/app
  
  # Copy dependency definitions
  COPY package*.json /usr/src/app/
  
  # Install dependecies
  RUN npm install
  
  # Get all the code needed to run the app
  COPY . /usr/src/app/
  
  # Expose the port the app runs in
  EXPOSE 3000
  
  # Serve the app
  CMD ["npm", "start"]
  </code></pre>
  
  <p>And finally my docker-compose.yml</p>
  
  <pre><code>version: '3' # specify docker-compose version
  
  # Define the services/containers to be run
  services:
    angular: # name of the first service
      build: client # specify the directory of the Dockerfile
      ports:
        - "4200:4200" # specify port forwarding
  #WHEN ADDING VOLUMES, ERROR APPEARS!!!!!!
      volumes:
        - ./client:/usr/src/app
  
    express: #name of the second service
      build: server # specify the directory of the Dockerfile
      ports:
        - "3000:3000" #specify ports forwarding
      links:
        - database
  #WHEN ADDING VOLUMES, ERROR APPEARS!!!!!!
      volumes:
        - ./server:/usr/src/app
  
    database: # name of the third service
      image: mongo # specify image to build container from
      ports:
        - "27017:27017" # specify port forwarding
  </code></pre>