quagga js modification to always use environment camera

I've got a working example using [login to view URL] which is an open source barcode decoder. I need my sample code to always choose the environment camera (facing away from the user) for mobile phones regardless of operating system. Currently it works fine on IOS but on android, it uses the user facing camera instead of the environment camera. This is a quick fix so I'm only considering bids $10 and under. Source will be provided to the winning bidder. Project approval and fund releasing will be immediately after verification across platforms. Do not bid unless you can complete within 24 hours of bid acceptance.