integrate lua-upstream-module in nginx container

[Pierpaolo1992]

Hi, i've an nginx container used as load balancer, on host port 9200. This is nginx config file:

upstream cdn-audio {
        server 192.168.99.103:9500;
        server 192.168.99.104:9500;
        server 192.168.99.105:9500;
   }

upstream cdn-video {

        server 192.168.99.103:9500;
        server 192.168.99.104:9500;
        server 192.168.99.105:9500;
    }


server {

listen 80;
server_name 172.17.0.1;
access_log /var/log/nginx/acces.log main;

location = /LynyrdSkynyrdFreebirdAudio.mp4 {

#           proxy_pass http://192.168.99.103:9500;

# proxy_pass http://cdn-audio/LynyrdSkynyrdFreebirdAudio.mp4;
add_header X-Upstream  $upstream_addr;
add_header Host $host;
if ($request_method = OPTIONS) {
        add_header Access-Control-Allow-Origin '*';
        add_header Access-Control-Allow-Headers "Authorization,Range";
        add_header Access-Control-Allow-Credentials "true";
        add_header Content-Length 0;
        add_header Content-Type text/plain;
        add_header Host $host;
        return 200;
    }

       return 302 $scheme://cdn-audio/LynyrdSkynyrdFreebirdAudio.mp4;

        }

location = /LynyrdSkynyrdFreebirdVideo.mp4 {

add_header X-Upstream  $upstream_addr;
#  proxy_pass http://cdn-audio/LynyrdSkynyrdFreebirdVideo.mp4;
add_header Host $host;


if ($request_method = OPTIONS) {
        add_header Access-Control-Allow-Origin '*' ;
        add_header Access-Control-Allow-Headers "Authorization,Range";
        add_header Access-Control-Allow-Credentials "true";
        add_header Content-Length 0;
        add_header Content-Type text/plain;
        add_header Host $host;
        return 200;
}


#       proxy_pass http://cdn-video$request_uri;

#       proxy_pass http://192.168.99.103:9500;

       return 302 $scheme://cdn-video/LynyrdSkynyrdFreebirdVideo.mp4;
#       add_header X-Upstream  $upstream_addr;

        }

   }

The point is: when i point to localhost:9200/LynyrdSkynyrdFreebirdVideo(or Audio).mp4, the browser cannot resolve "cdn-audio(or video) name".
I've read that your module, and i've seen here, could help me.
Could someone explain me how to integrate this module inside my nginx container?