Install wkhtmltopdf & wkhtmltoimage on CentOS 8

Install wkhtmltopdf rpm & wkhtmltoimage on CentOS 8; Through this tutorial, we will learn how to install wkhtmltopdf and wkhtmltoimage on centOS 8 system. According to https://wkhtmltopdf.org/ :- wkhtmltopdf and wkhtmltoimage are open source (LGPLv3) command line tools to render HTML into PDF