[jenkins] [ci] Create jenkins folder to store knowledge and example related to Jenkins

[tungbq]

Task:

• Under the root dir of https://github.com/tungbq/devops-basic
• Create a new folder name jenkins with a README.md file
• Add a brief description to that README.md file (just a place holder, maybe just add To be updated... into it, we will improve it later)

[github-actions[bot]]

This issue is stale because it has been open for 90 days with no activity.

[github-actions[bot]]

This issue was closed because it has been inactive for 60 days since being marked as stale.