catch any errors from running sign binary

[evanugarte]

lets wrap the subprocess.Popen in a try except block

rpi-led-controller/server.py

Line 156 in 843eb45

process = subprocess.Popen(

Test this by running the server without the development argument and updating the sign. does the server survive the error and let you try again? what if you make the command that we run something random like asdfasdf

use logging.exception in the except block to log an error