Merge pull request plotly#100 from plotly/dash-opioid-epidemic

Dash opioid epidemic

Author: YunkeXiao

apps/dash-opioid-epidemic/Procfile

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+web: gunicorn --pythonpath apps/dash-opioid-epidemic app:server

apps/dash-opioid-epidemic/README.md

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+# US opioid epidemic dataset and Dash app
+
+Poison induced death data was downloaded from [CDC Wonder](dash_app_screencast.gif), using cause-of-death codes X40–X44 (unintentional), X60–X64 (suicide), X85 (homicide), or Y10–Y14 (undetermined intent).
+
+[View the Dash app](https://dash-playground.plotly.host/dash-opioid-epidemic/)
+
+## Getting Started
+
+### Running the app locally
+
+First create a virtual environment with conda or venv inside a temp folder, then activate it.
+
+```
+virtualenv venv
+
+# Windows
+venv\Scripts\activate
+# Or Linux
+source venv/bin/activate
+
+```
+
+Clone the git repo, then install the requirements with pip
+
+```
+
+git clone https://github.com/plotly/dash-sample-apps
+cd dash-sample-apps/apps/dash-opioid-epidemic
+pip install -r requirements.txt
+
+```
+
+Run the app
+
+```
+
+python app.py
+
+```
+
+![plotly-dash-screencast](assets/app_screencast.gif)
+
+Dash app inspired by [this Tableau dashboard](https://www.cdc.gov/nchs/data-visualization/drug-poisoning-mortality/)