Run as electron app:
- Type in the terminal: electron .
- Set default camera in your computer settings to make sure the app uses the right camera

Run in browser:
- Windows: Right click index.html, click Run, should open in your default browser. Copy and paste the URL to your preferred browser. 
- Mac: Need to download Live Server extension. Then do the same steps as for Windows. 
On Chrome, navigate to chrome://settings/content/camera to change the default camera.

Exposure changes do not work on Mac, so this program is better suited for Windows.