docs: improve documentation for docker-autoscaler setup

[kayman-mk]

Description

Improve the documentation of the autoscaler setup. Totally outdated and wrong.

Fixes parts of #1304

[github-actions]

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[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
✅ COPYPASTE	jscpd	yes		no	no	1.74s
✅ MARKDOWN	markdownlint	1	1	0	0	0.75s
✅ MARKDOWN	markdown-link-check	1		0	0	2.43s
✅ REPOSITORY	checkov	yes		no	no	27.37s
✅ REPOSITORY	dustilock	yes		no	no	0.33s
✅ REPOSITORY	gitleaks	yes		no	no	0.79s
✅ REPOSITORY	git_diff	yes		no	no	0.01s
✅ REPOSITORY	grype	yes		no	no	25.59s
✅ REPOSITORY	secretlint	yes		no	no	0.63s
✅ REPOSITORY	syft	yes		no	no	1.31s
✅ REPOSITORY	trivy-sbom	yes		no	no	0.13s
✅ REPOSITORY	trufflehog	yes		no	no	3.79s
✅ SPELL	cspell	3		0	0	3.17s
✅ TERRAFORM	terraform-fmt	1	0	0	0	0.05s

See detailed report in MegaLinter reports
Set VALIDATE_ALL_CODEBASE: true in mega-linter.yml to validate all sources, not only the diff

[JulianCBC]

Looks good to me!

Even just cleaning up all the unnecessary parameters is a massive improvement.