Nginx http proxy with ssl example.

nginx.conf

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

server {
  listen 443 ssl http2;
  server_name api.example.com;
  ssl_certificate /etc/letsencrypt/live/api.example.com/fullchain.pem;
  ssl_certificate_key /etc/letsencrypt/live/api.example.com/privkey.pem;
  include ssl-params.conf;

  location / {
    proxy_pass http://127.0.0.1:3000;
    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;
  }
}