Another information about my configuration:
to reach my server I configured apache server with a proxy.
This is the config:
<IfModule mod_ssl.c>
<VirtualHost *:443>
ServerName mydomain
ServerAlias mydomain
ServerAdmin myemail
DocumentRoot /var/www/mydomain/html
<Directory /var/www/mydomain/html>
Options Indexes FollowSymLinks
AllowOverride All
Require all granted
</Directory>
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
<IfModule mod_dir.c>
DirectoryIndex index.php index.pl index.cgi index.html index.xhtml index.htm
</IfModule>
ProxyPreserveHost On
ProxyRequests Off
ProxyPass /strapi http://localhost:1337
ProxyPassReverse /strapi http://localhost:1337