feat: add variables to specify the AMI ids

[kayman-mk]

Description

At the moment the latest AMI is read at deploy time. But to get an immutable infrastructure we have to fix the AMI. This PR adds variables to set the AMI id.

[github-actions]

Hey @kayman-mk! 👋

Thank you for your contribution to the project. Please refer to the contribution rules for a quick overview of the process.

Make sure that this PR clearly explains:

• the problem being solved
• the best way a reviewer and you can test your changes

With submitting this PR you confirm that you hold the rights of the code added and agree that it will published under this LICENSE.

The following ChatOps commands are supported:

• /help: notifies a maintainer to help you out

Simply add a comment with the command in the first line. If you need to pass more information, separate it with a blank line from the command.

This message was generated automatically. You are welcome to improve it.

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ COPYPASTE	jscpd	yes		no	1.35s
✅ REPOSITORY	checkov	yes		no	24.9s
✅ REPOSITORY	dustilock	yes		no	0.18s
✅ REPOSITORY	gitleaks	yes		no	0.7s
✅ REPOSITORY	git_diff	yes		no	0.01s
✅ REPOSITORY	grype	yes		no	9.59s
✅ REPOSITORY	secretlint	yes		no	0.67s
✅ REPOSITORY	syft	yes		no	1.29s
✅ REPOSITORY	trivy-sbom	yes		no	0.07s
✅ REPOSITORY	trufflehog	yes		no	3.39s
✅ SPELL	cspell	5		0	2.31s
✅ TERRAFORM	terraform-fmt	4	0	0	0.35s

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

MegaLinter is graciously provided by