[Nginx] use python bootstrapper to start NGINX container

data/Dockerfiles/nginx/supervisord.conf

@@ -0,0 +1,27 @@
+[supervisord]
+nodaemon=true
+user=root
+
+[program:syslog-ng]
+command=/usr/sbin/syslog-ng --foreground  --no-caps
+stdout_logfile=/dev/stdout
+stdout_logfile_maxbytes=0
+stderr_logfile=/dev/stderr
+stderr_logfile_maxbytes=0
+autostart=true
+priority=1
+
+[program:bootstrap]
+command=/docker-entrypoint.sh
+stdout_logfile=/dev/stdout
+stdout_logfile_maxbytes=0
+stderr_logfile=/dev/stderr
+stderr_logfile_maxbytes=0
+priority=2
+startretries=10
+autorestart=true
+stopwaitsecs=120
+
+[eventlistener:processes]
+command=/usr/local/sbin/stop-supervisor.sh
+events=PROCESS_STATE_STOPPED, PROCESS_STATE_EXITED, PROCESS_STATE_FATAL