tested multiple files and return of syllables
multiple audio files from jquery ajax is working

also tested various error conditions (no praat, user sends a file which ffmpeg cant extract audio, general internal server error)
for https://github.com/OpenSourceFieldlinguistics/FieldDB/issues/1465
using just .TextGrid for rather than wav.TextGrid
using cors from npm works
serving textgrids/audio/video by corpus
can stream audio files but doesnt complete fix the ability to cue them
using express static route makes cueing audio possible

fixes https://github.com/OpenSourceFieldlinguistics/FieldDB/issues/1466