Add readme

Author: kellobri

dash-stock-pricing/README.md

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+# Stock Pricing Dashboard
+
+## About this example
+
+A Dash application makes it easy to transform your analysis into an interactive dashboard using Python so users can ask and answer questions in real-time, without having to touch any code.
+
+
+## Learn more
+
+* [Dash User Guide](https://dash.plotly.com/)
+* [User Guide: Dash](https://docs.posit.co/connect/user/dash/)
+
+## Requirements
+
+* Python version 3.7 or higher