docs: add Make as build system

[mdelapenya]

What does this PR do?

It adds Make as build system of the test framework, also fixing some Markdown syntax errors and permalinks.

Why is it important?

Keeps docs up-to-date

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have run the Unit tests for the CLI, and they are passing locally
• I have run the End-2-End tests for the suite I'm working on, and they are passing locally
• I have noticed new Go dependencies (run make notice in the proper directory)

[elasticmachine]

💚 Build Succeeded

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Build stats

• Build Cause: Pull request #886 opened

• Start Time: 2021-03-15T09:52:38.131+0000

• Duration: 16 min 49 sec

• Commit: 7d71c19

Test stats 🧪

Test	Results
Failed	0
Passed	19
Skipped	0
Total	19

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Tests succeeded.

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Test stats 🧪

Test	Results
Failed	0
Passed	19
Skipped	0
Total	19