Please help to optimize the site to the max.
The WP Smush is installed and currently optimizing 26000 images.
The server resources are limited, and the site is loading slowly. First goal is to improve site's loading speed and to load under 5 seconds.
When the Performance scan running the server gives 503 error. Current score based on the Page Speed Insights is 53/100
Support access is granted.
This is a live site