add charts from notebook

README.md

@@ -36,7 +36,10 @@ pipx uninstall expanse
 ## Explore
 
 > [!NOTE]  
-> Here is a [Quarto notebook](https://github.com/atlaslib/atlas/blob/main/examples/apple-health-exploration-clickhouse-chdb-altair-quarto/index.qmd) with example code and SQL queries for generating Vega-Altair charts
+> Here is a [Quarto notebook](https://github.com/atlaslib/atlas/blob/main/examples/apple-health-exploration-clickhouse-chdb-altair-quarto/index.qmd) with example code and SQL queries.
+>
+> The notebook uses Vega-Altair and Clickhouse (chDB) to explore Apple Health time series data in a .parquet file. The .parquet file was generated by Atlas from an Apple Health export.xml file.
+> ![vega-altair charts](https://github.com/atlaslib/atlas/assets/14825/96b63ae1-9bc9-4a01-aa7b-04ef4540d6eb)
 
 First we create the `.parquet` file from the `export.xml` file.