Linux/Web server configuration / enhancements

I have a LEMP stack running an instance of WordPress. I need several configuration tasks performed. The server is still a test server (DNS is not pointed to it), so restarting it is fine. Configuration task #1: Upgrade PHP to 7.3 The server has an older version of PHP on it. I think it is PHP 7.0. The old version of PHP needs to be removed and PHP upgraded to 7.3. PHP needs to be properly configured to support WordPress (i.e., it needs to include the necessary modules – especially OpCache or some or some other bytecode cache/accelerator). PHP 7.3 also must have the Predis module added (this is not currently installed). Configuration task #2: add the ngx_pagespeed module to NGINX NGINX is setup and working properly (and with a little bit of custom config using the ngx_http_perl_module). I need the ngx_pagespeed module added to the current NGINX implementation without breaking anything. Configuration task #3: Install Redis The server needs to have Redis installed on it. Install Redis (this is also why PHP needs to have the Predis module). Provide me with the location of the Redis config file in case I want to change cache size or other params; give me username and password when done. Configuration task #4: Install Rocket NGINX Rocket NGINX (project is here on Github: [login to view URL]), is a project that works with the WP Rocket Wordpress plugin & NGINX to cause NGINX to bypass PHP & Wordpress entirely when a cached version of a page exists. This needs to be installed and confirmed working. I will give SSH access to perform these tasks.