Added initial Dockerfile for quart served by gunicorn

files/supervisord.conf

+[supervisord]
+nodaemon=true
+
+[program:quartweb]
+command=gunicorn --worker-class quart.worker.GunicornWorker -w 4 -b 0.0.0.0:5000 app:app
+directory=/srv/quart
+autostart=true
+autorestart=true
+startsecs=10
+startretries=3
+stdout_logfile=/dev/fd/1
+stdout_logfile_maxbytes=0
+redirect_stderr=true