upstream docservice {
  server 127.0.0.1:PORT;
}

map $http_host $this_host {
    "" $host;
    default $http_host;
}

map $http_x_forwarded_proto $the_scheme {
     default $http_x_forwarded_proto;
     "" $scheme;
}

map $http_x_forwarded_host $the_host {
    default $http_x_forwarded_host;
    "" $this_host;
}

map $http_upgrade $proxy_connection {
  default upgrade;
  "" close;
}

proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $proxy_connection;
proxy_set_header X-Forwarded-Host $the_host;
proxy_set_header X-Forwarded-Proto $the_scheme;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

server {
    listen 0.0.0.0:443 ssl;
    listen [::]:443 ssl default_server;
    server_name SERVER_NAME
    server_tokens off;
    root /usr/share/nginx/html;

    ssl_certificate SSL_CERT;
    ssl_certificate_key SSL_KEY;
    ssl_verify_client off;
    ssl_ciphers "EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH";
    ssl_protocols  TLSv1 TLSv1.1 TLSv1.2;
    ssl_session_cache  builtin:1000  shared:SSL:10m;
    ssl_prefer_server_ciphers   on;

    add_header X-Content-Type-Options nosniff;
    location / {
      proxy_pass http://docservice;
      proxy_http_version 1.1;
  }
}