Add --debug option to server to log tracebacks on failures

podman build . -t cheat.sh
    podman run -it --rm -p 8002 cheat.sh bin/srv.py --debug

https://stackoverflow.com/questions/26026148/how-to-run-wsgiserver-in-verbose-or-debug-mode

bin/srv.py

@@ -274,6 +274,9 @@ def answer(topic=None):
         return result
     return Response(result, mimetype='text/plain')
 
+
+if '--debug' in sys.argv:
+    app.debug = True
 if 'CHEATSH_PORT' in os.environ:
     PORT = int(os.environ.get('CHEATSH_PORT'))
 else: