fix: update puppet guide article after review (#29030)

guide/english/devops/puppet/index.md

@@ -3,14 +3,43 @@ title: Puppet
 ---
 ## Puppet
 
-This is a stub. <a href='https://github.com/freecodecamp/guides/tree/master/src/pages/devops/docker/index.md' target='_blank' rel='nofollow'>Help our community expand it</a>.
+### What is Puppet
 
-<a href='https://github.com/freecodecamp/guides/blob/master/README.md' target='_blank' rel='nofollow'>This quick style guide will help ensure your pull request gets accepted</a>.
+Puppet is a configuration management tool where a developer describes the target state of a number of resources using a declarative language.
+In simple words, Puppet is a system for automating system administration tasks.
+
+Here are a few resources that will help in introduction to Puppet:
+
+ * [Puppet wiki](https://docs.puppet.com/wiki_redirect.html)
+ * [Introduction to Puppet](https://puppet.com/docs/puppet/6.0/architecture.html)
+
+### Puppet documentation
+ * [Complete Puppet reference manual](https://puppet.com/docs/puppet/6.0/puppet_index.html)
+ * [Language Basics](https://puppet.com/docs/puppet/6.0/lang_summary.html)
+ * [Resource Type Reference](https://puppet.com/docs/puppet/6.0/type.html)
+
+### Where to start
+
+ - Play around with Puppet. You might want to use <a href="https://learn.puppet.com/">Puppet Training</a>
+ - Adopt <a href="https://docs.puppet.com/hiera/">Hiera</a> as early as possible to allow you to write clean code
+ - Adopt the Roles and Profiles pattern as early as possible
+ - Once Hiera and the Roles and Profiles pattern have been adopted look into the following:
+ - Test Driven Development using <a href="https://github.com/rodjek/rspec-puppet/">rspec-puppet</a>
+ - Deployment through controlled environments with <a href="https://puppet.com/docs/pe/2019.0/r10k.html">r10k</a>
+
+### Hiera
+
+Use Hiera to separate your data / parameter values from your Puppet code
+
+### eyaml
+
+When you need to store sensitive data such as password for service accounts, use eyaml as a Hiera back-end. The secrets will become available in your puppet code as facts.
+
+Have a look at the following article for more information: <a href="https://puppet.com/blog/encrypt-your-data-using-hiera-eyaml">Encrypt Your Data Using Hiera-Eyaml</a>
 
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 #### More Information:
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+
 <a href='https://puppet.com/docs/puppet/5.3/architecture.html' target='_blank' rel='nofollow'>Official Puppet documentation</a>