Update Dockerfile and nginx.conf

This commit updates the Dockerfile to expose port 17000 instead of 8000 and updates the nginx.conf file to listen on port 80 instead of 8080.

nginx.conf

@@ -30,8 +30,8 @@ http {
 
     #include /etc/nginx/conf.d/*.conf;
     server {
-        listen       8080;
-        listen  [::]:8080;
+        listen       80;
+        listen  [::]:80;
         server_name  localhost;
 
         #access_log  /var/log/nginx/host.access.log  main;