Some problems with building the `node-cryptonote-pool` (about nodeJS versions)
**关于node-cryptonote-pool的一点小疑问**
因为隔壁项目很久没有更新也没有人回复了，所以就来这边借地方问一下=。=！

在安装过程中，使用nmp update时，有个multi-hashing一直安装失败~

> gyp ERR! build error
> gyp ERR! stack Error: `make` failed with exit code: 2
> gyp ERR! stack     at ChildProcess.onExit (/usr/lib/node_modules/npm/node_module      s/node-gyp/lib/build.js:258:23)
> gyp ERR! stack     at emitTwo (events.js:126:13)
> gyp ERR! stack     at ChildProcess.emit (events.js:214:7)
> gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_proces      s.js:198:12)
> gyp ERR! System Linux 4.4.0-62-generic
> gyp ERR! command "/usr/bin/node" "/usr/lib/node_modules/npm/node_modules/node-gy      p/bin/node-gyp.js" "rebuild"
> gyp ERR! cwd /srv/pool/node_modules/multi-hashing
> gyp ERR! node -v v8.9.3
> gyp ERR! node-gyp -v v3.6.2
> gyp ERR! not ok
> npm ERR! code ELIFECYCLE
> npm ERR! errno 1
> npm ERR! multi-hashing@0.0.9 install: `node-gyp rebuild`
> npm ERR! Exit status 1
> npm ERR!
> npm ERR! Failed at the multi-hashing@0.0.9 install script.
> npm ERR! This is probably not a problem with npm. There is likely additional log      ging output above.
> 
> npm ERR! A complete log of this run can be found in:
> npm ERR!     /root/.npm/_logs/2017-12-21T23_39_48_854Z-debug.log

手动在github上将multi-hashing下下来，然后在启动时又出现这个问题

> Error: Cannot find module '/srv/pool/node_modules/bignum/binding/bignum.node'
>     at Function.Module._resolveFilename (module.js:536:15)
>     at Function.Module._load (module.js:466:25)
>     at Module.require (module.js:579:17)
>     at require (internal/module.js:11:18)
>     at Object.<anonymous> (/srv/pool/node_modules/bignum/index.js:4:11)
>     at Module._compile (module.js:635:30)
>     at Object.Module._extensions..js (module.js:646:10)
>     at Module.load (module.js:554:32)
>     at tryModuleLoad (module.js:497:12)
>     at Function.Module._load (module.js:489:3)

这边看到您的演示站内是没有问题的，所以前来请教下您是否有遇到这个问题，还有就是您是否方便提供下nodejs、ubuntu的版本信息，我这边看下是不是由于版本的问题导致的
我目前的环境中nodejs为8.9.3，ubuntu为16.04 x64