Upload max file size setting (linux/apache/lucee)

dev
1

My environment configuration is :
Linux debian 10
apache 2.4
Lucee 5.3.7.47

Where , or what file to modify to set the max file size for a website ?
Is that in Lucee, in Tomcat, in Apache, in Linux
And what code to write to enable this ?

Thanks for express Help.
Pierre.