add zenodo and more to contributing guidelines

Author: Andrew McCluskey

_build/intro.html

@@ -7,7 +7,7 @@
 next_page:
   url: /getting_started.html
 suffix: .md
-search: org license href zenodo creativecommons introduction python chemists doi src div style contributing rel licenses creative commons xxxxxximg badge xxxxxx svg class left clear both please guidelines github com pythoninchemistry intropythonchemists blob master content md contribute img alt border width l x png abr work licensed under attribution international
+search: org license href creativecommons introduction python chemists zenodo badge img src alt div style contributing rel licenses creative commons latestdoi svg doi clear both please guidelines github com pythoninchemistry intropythonchemists blob master content md contribute border width l x png abr work licensed under attribution international
 
 comment: "***PROGRAMMATICALLY GENERATED, DO NOT EDIT. SEE ORIGINAL FILES IN /content***"
 ---
@@ -19,7 +19,7 @@
 
 <div class="cell border-box-sizing text_cell rendered"><div class="inner_cell">
 <div class="text_cell_render border-box-sizing rendered_html">
-<h1 id="An-Introduction-to-Python-for-Chemists">An Introduction to Python for Chemists<a class="anchor-link" href="#An-Introduction-to-Python-for-Chemists"> </a></h1><p><a href="https://doi.org/10.5281/zenodo.xxxxxx"><img src="https://zenodo.org/badge/DOI/10.5281/zenodo.xxxxxx.svg" class="left"></a></p>
+<h1 id="An-Introduction-to-Python-for-Chemists">An Introduction to Python for Chemists<a class="anchor-link" href="#An-Introduction-to-Python-for-Chemists"> </a></h1><p><a href="https://zenodo.org/badge/latestdoi/248480226"><img src="https://zenodo.org/badge/248480226.svg" alt="DOI"></a></p>
 <div style="clear:both;"></div><p>An Introduction to Python for Chemists</p>
 <p>Please look at the <a href="https://github.com/pythoninchemistry/intro_python_chemists/blob/master/content/contributing.md">contributing guidelines</a> if you would like to contribute.</p>
 <p><a rel="license" href="http://creativecommons.org/licenses/by/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by/4.0/88x31.png" /></a><br />This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International License</a>.</p>

content/contributing.md

@@ -68,6 +68,12 @@ Make sure to [keep your fork up to date](https://help.github.com/articles/syncin
 Try to keep the changes focused.
 We've found that working on a [new branch](https://help.github.com/articles/creating-and-deleting-branches-within-your-repository/) makes it easier to keep your changes targeted.
 
+Once you have made changes in a Jupyter Notebook file, please build the [`jupyter-book`](https://jupyterbook.org/intro.html) before you move to the next step. 
+
+```
+jupyter-book build --overwrite .
+```
+
 **4. Submit a [pull request](https://help.github.com/articles/creating-a-pull-request/).**
 
 A member of the development team will review your changes to confirm that they can be merged into the main code base.

content/intro.md

@@ -1,6 +1,6 @@
 # An Introduction to Python for Chemists
 
-<a href="https://doi.org/10.5281/zenodo.xxxxxx"><img src="https://zenodo.org/badge/DOI/10.5281/zenodo.xxxxxx.svg" class="left"></a>
+<a href="https://zenodo.org/badge/latestdoi/248480226"><img src="https://zenodo.org/badge/248480226.svg" alt="DOI"></a>
 <div style="clear:both;"></div>
 
 An Introduction to Python for Chemists