Why doesn't npm install work inside a docker container?

Question

npm

Everything works on a local wheelbarrow, on a server one of the containers is not built due to the fact that npm cannot download the necessary packages.
Here is the Dockerfile, build hangs on RUN npm install -g express-generator

# Pull base image from stock node image.
FROM node

# Maintainer
MAINTAINER Robert Schultz <[email protected]>

# Add the current working folder as a mapped folder at /usr/src/app
ADD . /usr/src/app

# Set the current working directory to the new mapped folder.
WORKDIR /usr/src/app

# Install the express generator which gives you also scaffolding tools.
RUN npm install -g express-generator

# Scaffold a new express app using hogan.js and less pre-processor.
RUN express -H -f -c less

# Install your application's dependencies
RUN npm install

# Expose the node.js port to the Docker host.
EXPOSE 3000

# This is the stock express binary to start the app.
CMD [ "bin/www" ]

Having assembled the container without npm install and entering it, I found that the node and npm are up-to-date versions, while when you manually start executing the command on npm install pm2, the installation hangs with the inscription rollbackFailedOptional I ping registry.npmjs.org - there is a ping In the npm config registered registry.npmjs.org, the result has not changed What is the problem?