Add free resources from CodeCrafters

[abhishekbose87]

What does this PR do?

Add resource(s) | Remove resource(s) | Add info | Improve repo Add resources to free-programming-interactive-tutorials

For resources

Description

We help engineers get really good at their craft by building your own Redis, Git, Docker, SQLite from scratch. We wanted to add some content that is free on our website.

Why is this valuable (or not)?

valuable for experienced folks who want to dig deeper into their dev tools.

How do we know it's really free?

it can be accessed without creating an account

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

Checklist:

• [x] Read our contributing guidelines.
• [x] Search for duplicates.
• [x] Include author(s) and platform where appropriate.
• [x] Put lists in alphabetical order, correct spacing.
• [x] Add needed indications (PDF, access notes, under construction).
• [x] Used an informative name for this pull request.

Follow-up

• Check the status of GitHub Actions and resolve any reported warnings!

[github-actions[bot]]

Linter failed, fix the error(s):

free-programming-books/more/free-programming-interactive-tutorials-en.md
160:1-165:113  warning  Alphabetical ordering: swap l.165 and l.164                            alphabetize-lists  remark-lint
160:1-165:113  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint
418:1-422:117  warning  Alphabetical ordering: swap l.421 and l.420                            alphabetize-lists  remark-lint

[github-actions[bot]]

Linter failed, fix the error(s):

free-programming-books/more/free-programming-interactive-tutorials-en.md
417:1-421:108  warning  Alphabetical ordering: swap l.421 and l.420                            alphabetize-lists  remark-lint
417:1-421:108  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint

[eshellman]

Thanks, and welcome to free-programming-books!

[syedmaazsaeed]

@eshellman If you're still facing any MERN stack issues, can I help ?