nginx config:HTTPS

open gzip

# nano /etc/nginx/nginx.conf 

gzip_vary on;
gzip_proxied any;
gzip_comp_level 6;
gzip_buffers 16 8k;
gzip_http_version 1.1;
gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript  image/jpeg image/gif image/png 
application/octet-stream text/html;

single config

server {
  server_name xxx.cn;
  listen 80;
  root /var/www/project/public;

  location ^~ /assets/ {
    gzip on;
    expires max;
    add_header Cache-Control public;
  }

  try_files $uri/index.html $uri @unicorn;
  location @unicorn {
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $http_host;
    proxy_redirect off;
    proxy_pass http://localhost:3001;
}

  error_page 500 502 503 504 /500.html;
  client_max_body_size 4G;
  keepalive_timeout 10;
}

http to https

server {
  listen      http://xxxx.cn;
  server_name server_name;
  rewrite     ^   https://$server_name$request_uri? permanent;
}