Use cases:
/stations: Displays the list of all the Volta Charging station across U.S. OnClick of the marker on the map will display the detail of that particular station.
/cars: Provides a barchart of all the makes and the number of models that use the Volta Charging stations.
/cars-by-make: Provides all informative list of all the makes and the list of their models.
To view the application just click on https://volta-challenge.herokuapp.com/