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Getting no such file package.json when running npm install

I am running Docker on Windows 10 and when I run docker-compose up -d I get this errror but I don’t know why.

npm WARN saveError ENOENT: no such file or directory, open '/var/www/package.json'
npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN enoent ENOENT: no such file or directory, open '/var/www/package.json'
npm WARN www No description
npm WARN www No repository field.
npm WARN www No README data
npm WARN www No license field.

Here is my docker-compose.yaml file

version: '3'

  # Nginx client app server
    container_name: nginx-client
        context: ./docker/nginx-client
        dockerfile: Dockerfile
    restart: unless-stopped
      - 28874:3000
        - ./client:/var/www
      - app-network

# Networks
    driver: bridge

And here is my Dockerfile

FROM node:12
WORKDIR /var/www
RUN npm install
CMD ["npm", "run", "serve"]

I found the solution to my problem. It turned out that the binding of volumes doesn’t take place until the container is fully created. So the files that I THOUGHT were there were not actually there yet. So I could do something like this

COPY ./client/package*.json ./
RUN npm install

json file in the project directory is missing then you can create it by npm init. if the package. json file is already created in the project directory then there is a possibility that you are not running your project from the right path. Use cd your-project-path in the terminal and then run your project from there.