ipv6-test-backend/nginx/conf.d/6.conf

server {
  listen [::]:80;
  server_name 6.ipv6test.online;

  gzip on;
  gzip_min_length 1k;
  gzip_buffers 4 16k;
  gzip_http_version 1.1;
  gzip_comp_level 9;
  gzip_types text/plain application/x-javascript text/css application/xml text/javascript application/javascript application/json;
  gzip_disable "MSIE [1-6]\.";
  gzip_vary on;

  location / {
    proxy_pass http://ipv6-test-backend:8080/;
    proxy_set_header Connection $http_connection;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;
  }
}