Build a Tribute Page stuck at list

Tell us what’s happening:
I am stuck with the list. I want to center the list, but the list items (the text) must be aligned to the left.

Your code so far
https://codepen.io/helloworld123-/pen/BaabGZr

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36.

Challenge:
Build a tribute page about Norman Borlaug

Link to the challenge:

delete text-align:center; property from body element and add margin-left:20%; and margin-right:20%; to ul element.