chore: CI/Devops updates updates

[sggerard]

Description

Additional changed discussed with Simen to ready the application for production and future work.

Changes

• Separate production deployment into its own manual workflow.
• Update Readme with deployment information.
• Add SonarCloud scanning.
• Increase replica sets in production.

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Thanks for the PR!

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• CMS

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[sonarcloud[bot]]

Quality Gate failed

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C Maintainability Rating on New Code (required ≥ A)

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