Add Binder tutorial

Author: dou-du

README.md

@@ -1,9 +1,19 @@
 # widget-periodictable
 
-A jupyter widget to select chemical elements from the periodic table.
+A jupyter widget to select chemical elements from the periodic table. This is a update version of the
+widget from:
+
+https://github.com/aiidalab/aiidalab-widget-periodictable
+
+,which support both Jupyter notebook and JupyterLab.
+
 
 ![periodic table](./periodictable.png)
 
+## Usage and try it on Binder
+
+[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/osscar-org/widget-periodictable/master?urlpath=%2Flab%2Ftree%2Fexamples%2Fintroduction.ipynb)
+
 ## Installation
 
 You can install using `pip`:

postBuild

@@ -0,0 +1,6 @@
+#!/bin/bash
+jupyter labextension install @jupyter-widgets/jupyterlab-manager 
+jupyter nbextension      enable --py --sys-prefix appmode
+jupyter serverextension  enable --py --sys-prefix appmode
+jupyter nbextension      enable --py widgetsnbextension
+jupyter lab build 

requirements.txt

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+ipywidgets==7.5.0
+appmode==0.6.0
+IPython==7.8.0
+widget-periodictable