npm ERR! Error: failed to fetch from registry: 解决办法
npm http GET https://registry.npmjs.org/socket.io
npm ERR!Error: failed to fetch from registry:
#sudo npm config set registry http://registry.npmjs.org/
npm http GET https://registry.npmjs.org/socket.io
npm ERR!Error: failed to fetch from registry:
#sudo npm config set registry http://registry.npmjs.org/