Changed CAT ES endpoint to env instead of hardcoded string

[akeldamas]

Description

Changed CAT ES endpoint to env instead of hardcoded string

Related Issue(s)

List and link to any issue(s) this PR addresses, if applicable.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Refactoring (changes that neither fixes a bug nor adds a feature)
• Performance improvement (changes that improve existing functionality)
• Test update (changes that modify tests)
• Other (please describe):

Checklist

• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.

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