feat: writing chapter about nginx

[alemorvan]

Author checklist (Completed by original Author)

• Good fit for the Rocky Linux project? Title and Author Metatags inserted ?
• If applicable, steps and instructions have been tested to work
• Initial self-review to fix basic typos and grammar completed

Rocky Documentation checklist (Completed by Rocky team)

• 1st Pass (Document is good fit for project and author checklist completed)
• 2nd Pass (Technical Review - check for technical correctness)
• 3rd Pass (Detailed Editorial Review and Peer Review)
• Final approval (Final Review)

[sspencerwire]

@EzequielBruni Would you have time to give your technical opinion on the content here? I know you've used Nginx some. @alemorvan requested this in the documentation chat.

[EzequielBruni]

I'll give it a look.

[alemorvan]

@sspencerwire please merge this document as this, as it is good enought for a first read, and later, as soon as ezequiel as time, we will open a new merge request. It just miss the Workshop part, the other part are ok.

Thx!

[github-actions]

Test results for 441b46b:

Number of broken URLs: 4

URL,RESULT,FILENAME
 http://docs.rockylinux.lan,failed,books/web_services/022-web-servers-nginx.md
 http://www.neelc.org/,failed,guides/contribute/README.md
 https://git.sr.ht/%7Equartsize/,failed,guides/contribute/README.md
 https://certbot.eff.org/instructions?ws=apache&os=centosrhel8,failed,guides/security/generating_ssl_keys_lets_encrypt.md

[sspencerwire]

@sspencerwire please merge this document as this, as it is good enought for a first read, and later, as soon as ezequiel as time, we will open a new merge request. It just miss the Workshop part, the other part are ok.

Thx!

I should be able to get to this later today. I want to be able to merge and then edit it right away.

[SergeCroise]

LGTM!