Devops resources

[Manpreets59]

What does this PR do?

Add new free DevOps course resources to the repository.

IMPORTANT

Read our contributing guidelines
.

Is this a revision of a previously submitted PR?
No, this is a new submission.

For resources
Description

This PR adds a collection of free and high-quality DevOps course resources that help learners understand essential DevOps concepts such as CI/CD, Docker, Kubernetes, Infrastructure as Code, and Cloud fundamentals. These courses are ideal for beginners and intermediate learners who want to gain hands-on knowledge in modern DevOps practices.

Why is this valuable (or not)?

DevOps is one of the most in-demand skill sets in the industry. These curated courses are completely free, well-structured, and provided by reputable instructors and platforms such as Kunal Kushwaha, TechWorld with Nana, and freeCodeCamp. Adding them will expand the repository’s offerings in the DevOps domain, helping more learners access quality education at no cost.

How do we know it's really free?

All resources are verified to be freely accessible via their official platforms (YouTube, freeCodeCamp, or official documentation sites) without any paywalls or registration requirements.

For book lists, is it a book? For course lists, is it a course? etc.

This contribution adds course resources (not books).

Checklist:

Search
for duplicates.

Include author(s) and platform where appropriate.

Put lists in alphabetical order, correct spacing.

Add needed indications (e.g., “YouTube”, “Video Course”).

Used an informative name for this pull request:
Add free DevOps course resources

Follow-up

I will monitor GitHub Actions and fix any warnings or formatting issues flagged during the review process.

[github-actions]

Linter failed, fix the error(s):

free-programming-books/courses/freeCoursesDO.md
  5:1-12:65  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint
16:1-21:112  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint
25:1-33:119  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint
 37:1-42:65  warning  Alphabetical ordering: swap l.40 and l.39                              alphabetize-lists  remark-lint
 37:1-42:65  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint
 46:1-55:78  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint
 47:3-55:78  warning  Alphabetical ordering: swap l.49 and l.48                              alphabetize-lists  remark-lint
 59:1-66:89  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint
 70:1-70:73  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint
 74:1-81:95  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint
 85:1-88:70  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint
 92:1-96:81  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint

[github-actions]

Linter failed, fix the error(s):

free-programming-books/courses/freeCoursesDO.md
  5:1-12:65  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint
16:1-21:112  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint
25:1-33:119  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint
 37:1-42:65  warning  Alphabetical ordering: swap l.40 and l.39                              alphabetize-lists  remark-lint
 37:1-42:65  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint
 46:1-55:78  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint
 47:3-55:78  warning  Alphabetical ordering: swap l.49 and l.48                              alphabetize-lists  remark-lint
 59:1-66:89  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint
 70:1-70:73  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint
 74:1-81:95  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint
 85:1-88:70  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint
 92:1-96:81  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint