nodedeploy-server

server {
  server_name testdeploy.rocketseat.com.br;

  location / {
    proxy_pass http://127.0.0.1:3333;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection 'upgrade';
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_cache_bypass $http_upgrade;
  }
}

If someone had a problem with transfer file max size between the server api and some external application (an application like a react app), you can add the following property at http block of the application ngnix file.

http{
...
client_max_body_size 100m;
...
}

ps: you can increase or decrease that value.