Run the container of npm-proxy-cache
docker run --restart=always --net=host -p 8080:8080 -t folha/npm-proxy-cache --name=npm-proxy-cache
Add to /etc/rc.local
docker start npm-proxy-cache
Monitoring
docker logs --follow --tail 10 npm-proxy-cache
Use it with npm, replacing the npm-proxy-cache hostname below with the ip or hostname you have the container above running at.
npm --proxy http://npm-proxy-cache:8080 --https-proxy http://npm-proxy-cache:8080 --strict-ssl false install