JSF and Nginx: uploading files fails when server behind Nginx - nginx

Question

with JSF 2.3, Jakarta EE 8 and Wildfly 23 / Payara 5
Uploading a file with <h:input> or <p:fileUpload> works fine but fails when Nginx is turned on. The file is never received by the backing bean.
is there any configuration to add to the server? (Payara or Wildfly)
the Nginx config file has surely errors in it?
app.conf:
upstream payara{
least_conn;
server localhost:8080 max_fails=3 fail_timeout=5s;
server localhost:8181 max_fails=3 fail_timeout=5s;
}
server {
if ($host = nocodefunctions.com) {
return 301 https://$host$request_uri;
} # managed by Certbot
listen 80;
access_log /var/log/nginx/payara-access.log;
error_log /var/log/nginx/payara-error.log;
#Replace with your domain
server_name nocodefunctions.com;
return 301 https://$host$request_uri;
}
server {
listen 443 ssl;
server_name nocodefunctions.com;
ssl_certificate /etc/letsencrypt/live/xxxxx/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/xxxxx/privkey.pem; # managed by Certbot
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;
ssl_ciphers "EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH";
location /nocodeapp-web-front-1.0 {
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header X-Forwarded-Proto https;
proxy_connect_timeout 240;
proxy_send_timeout 240;
proxy_read_timeout 240;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_pass http://payara$request_uri;
}
location = / {
proxy_pass http://payara;
return 301 https://nocodefunctions.com/nocodeapp-web-front-1.0;
}
}

Answer 1

The issue was: my file was larger than the size limit for uploads by nginx, which is set by default to 1m.
The solution consists in adding client_max_body_size 8M; (or any other value) to the config file, more details available in this SO post.