Fix nginx restart failed.

install_orbit_environment.sh

@@ -12,6 +12,11 @@ sudo apt-get install -y postfix
 sudo service postfix start
 #install nginx 1.18
 sudo apt install nginx -y
+sudo nginx -t
+nginx_status="$(echo $?)"
+if [ $nginx_status != 0 ]; then
+	sudo sed -i 's/\([^#]include \/etc\/nginx\/sites-enabled\/*\)/\#\1/g' /etc/nginx/nginx.conf
+fi
 sudo service nginx restart
 cd /etc/nginx/
 sudo mkdir orbit_sites/