The IBM Modernization Redbook contains a wealth of information.
Web Technology, and the IBM i operating system have evolved greatly over the years since this Redbook was written -- but this IBM Redbook still contains a wealth of useful information.
What is an IBM Redbook
IBM Redbooks are technical books developed and published by IBM's International Technical Support Organization. IBM Redbooks are ITSO's core product. They typically provide positioning and value guidance, installation and implementation experiences, typical solution scenarios, and step-by-step "how-to" guides. They often include sample code and other support materials that are also available as downloads.
This particular redbook "Modernizing IBM i Applications from the Database up to the User Interface and Everything in Between" was last updated back in 2014. Web Technology, and IBM i system have evolved greatly over the years since, but it still contains a wealth of useful information.
In the following lessons, I have taken the redbook, rewritten and updated each section - I hope you find it useful!