404 not found on Magento2 and nginx, Ubuntu

I've been trying to set up my magento2 on nginx server but when i tried to access the page via url, it said 404 page not found.

here is the 404 not found

I followed this instruction on magento website:https://experienceleague.adobe.com/en/docs/commerce-operations/installation-guide/prerequisites/web-server/nginx#install-and-configure-mysql-1

I did almost everything like this instruction except the last step to Configure SELinux and Firewalld as I read that enabling SeLinux is very risky.

An answer and solution to fix this problem