Well, I followed this tutorial https://docs.nodebb.org/installing/os/ubuntu/
All went great.
Nginx config file
Server globals
user www-data;
worker_processes auto;
worker_rlimit_nofile 65535;
error_log /var/log/nginx/error.log crit;
pid /var/run/nginx.pid;
Worker config
events {
worker_connections 1024;
use epoll;
multi_accept on;
}
http {
# Main settings
sendfile on;
tcp_nopush on;
tcp_nodelay on;
client_header_timeout 1m;
client_body_timeout 1m;
client_header_buffer_size 2k;
client_body_buffer_size 256k;
client_max_body_size 256m;
large_client_header_buffers 4 8k;
send_timeout 30;
keepalive_timeout 60 60;
reset_timedout_connection on;
server_tokens off;
server_name_in_redirect off;
server_names_hash_max_size 512;
server_names_hash_bucket_size 512;