fix link, add example app

Author: jenna-jordan

README.md

@@ -13,7 +13,7 @@ We'd like to ask you to familiarize yourself with our [Contribution Guide](CONTR
 the [more detailed guidelines][lesson-example] on proper formatting, ways to render the lesson locally, and even
 how to write new episodes.
 
-Please see the current list of [issues][https://github.com/jenna-jordan/data-visualization-workshop/issues] for ideas for contributing to this
+Please see the current list of [issues][issues] for ideas for contributing to this
 repository. For making your contribution, we use the GitHub flow, which is
 nicely explained in the chapter [Contributing to a Project](http://git-scm.com/book/en/v2/GitHub-Contributing-to-a-Project) in Pro Git
 by Scott Chacon.
@@ -36,3 +36,4 @@ A list of contributors to the lesson can be found in [AUTHORS](AUTHORS)
 To cite this lesson, please consult with [CITATION](CITATION)
 
 [lesson-example]: https://carpentries.github.io/lesson-example
+[issues]: https://github.com/carpentries-incubator/python-interactive-data-visualizations/issues

index.md

@@ -5,6 +5,12 @@ permalink: index.html  # Is the only page that doesn't follow the pattern /:path
 ---
 This workshop lesson is an introduction to making interactive data visualizations in Python. Learners will create a new environment using [conda][anaconda], wrangle data into the proper format using [pandas][pandas] library, create visualizations using the [Plotly][plotly] Python library, and display these visualizations and create widgets using [Streamlit][streamlit].
 
+> ## Preview the app
+> For a preview of what learners will be creating in this lesson (including the exercises), click the "Open in Streamlit" button below. 
+> [![Open in Streamlit](https://static.streamlit.io/badges/streamlit_badge_black_white.svg)](https://share.streamlit.io/jenna-jordan/interact-with-gapminder-data-app/main/app.py)
+> The repository that contains this example Streamlit app can be found [here](https://github.com/jenna-jordan/interact-with-gapminder-data-app).
+{: .callout}
+
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