Ngnix + django +nodejs : Uncaught SyntaxError: Unexpected token '<'

This is first time using nginx and nodejs. I have two apps one is built using django and other is built using nodejs (expressjs +openvidu). I am trying to configure nginx, django app works fine, I am having trouble with nodejs. nginx is not serving js files. I am getting the below error in console,(I suspect it is because browser is not able to find JavaScript file) both of my js files present under public folder.

Uncaught SyntaxError: Unexpected token '<'

Could you also suggest me if this is not the proper way to deploy django and nodejs

Below is my nginx configuration. /meeting is the node app.

 server {

  server_name sophie.ovgu.de;

  location /meeting {
    proxy_pass https://localhost:5000;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection 'upgrade';
    proxy_set_header Host $host;
    proxy_cache_bypass $http_upgrade;
   }
  location /videoapp {
    proxy_pass http://unix:/run/gunicorn.sock;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection 'upgrade';
    proxy_set_header Host $host;
    proxy_cache_bypass $http_upgrade;
   }


    listen [::]:443 ssl ipv6only=on; # managed by Certbot
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/sophie.ovgu.de/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/sophie.ovgu.de/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

}
server {
    if ($host = sophie.ovgu.de) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


  listen 80;
  listen [::]:80;

  server_name sophie.ovgu.de;
    return 404; # managed by Certbot


}

Please note "proxy_pass https://localhost:5000" this should be https as openvidu server requires it. Please refer this link

This is my folder structure

├───node_modules
├───public
│     app.js
│     openvidu-browser-2.18.0.js   
│───views
        index.ejs
│   openviducert.pem
│   openvidukey.pem
│   package-lock.json
│   package.json
│   README.md
│   server.js

This is how I am calling js file in index.html

>       <script src="/openvidu-browser-2.18.0.js"></script>
>       <script src="/app.js"></script>
>       <script>