npm install socket.io 出错: [ws v0.4.18] Attempting to compile blazing fast native extensions.
[ws v0.4.18] Native extension compilation failed.
[ws v0.4.18] On Windows, native extensions require Visual Studio and Python.
[ws v0.4.18] On Unix, native extensions require Python, make and a C++ compiler.
[ws v0.4.18] Start npm with --ws:verbose to show compilation output (if any).