Installation error on Windows

I follow to our instruction.

```
conda create -y -n beakerx python>=3 nodejs pandas openjdk=8.0.121 maven py4j requests
activate beakerx
conda config --env --add pinned_packages openjdk=8.0.121
conda install -y -c conda-forge ipywidgets
cd beakerx
pip install -e . --verbose
cd ..
beakerx install
beakerx_databrowser install
```
while I run
`pip install -e . --verbose`
I get this error :

> ERROR in ./node_modules/css-loader!./node_modules/sass-loader/lib/loader.js!./src/shared/style/beakerx.scss
> Module build failed: Error: Missing binding D:\PR\TWOSIGMA\beakerx\js\notebook\node_modules\node-sass\vendor\win32-x64-64\binding.node
> Node Sass could not find a binding for your current environment: Windows 64-bit with Node.js 10.x
>
> Found bindings for the following environments:
> - Windows 64-bit with Node.js 8.x

To fix this error I installed nodejs 8.9 by:
`conda install nodejs=8.9 `