Fix face recognition fooled by image

[M-Davies]

The face recognition feature can be easily fooled by a picture on a phone or still image in real life. Obviously this is not ideal so I need to figure out a way to counter tricks that will exploit this vulnerability. Some ideas:

• https://stackoverflow.com/questions/62290080/detecting-liveness-with-aws-rekognition
• Comparing landmark positions when detecting the face -> https://docs.aws.amazon.com/rekognition/latest/dg/faces-detect-images.html
• https://github.com/aws-samples/liveness-detection