Use supervisor and fixup env generation

supervisor/nginx.conf

@@ -0,0 +1,12 @@
+[program:nginx]
+priority=100
+directory=/tmp
+command=/usr/sbin/nginx -g "daemon off;"
+user=root
+autostart=true
+autorestart=true
+stdout_logfile=/dev/stdout
+stdout_logfile_maxbytes=0
+stderr_logfile=/dev/stderr
+stderr_logfile_maxbytes=0
+