the description for this gist

post.

server {
  listen         80;
  server_name    chat.mypage.com;
  return         301 https://$server_name$request_uri;
}

server {
  listen 443 ssl;
  server_name chat.mypage.com;

  ssl on;
  ssl_certificate /etc/letsencrypt/live/chat.mypage.com/fullchain.pem;
  ssl_certificate_key /etc/letsencrypt/live/chat.mypage.com/privkey.pem;
  ssl_session_timeout 5m;
  ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
  ssl_ciphers 'EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH';
  ssl_prefer_server_ciphers on;
  ssl_session_cache shared:SSL:10m;

  location / {
    gzip off;
    proxy_set_header X-Forwarded-Ssl on;
    client_max_body_size 50M;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    proxy_set_header Host $http_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;
    proxy_set_header X-Frame-Options SAMEORIGIN;
    proxy_pass http://127.0.0.1:6324;
  }
}