Add .gitignore rules for Terraform variable files

[Copilot]

Terraform variable files (*.tfvars) typically contain sensitive credentials like API keys and service principals but were not ignored, risking accidental commits of secrets.

Changes

• Added *.tfvars to .gitignore to exclude all Terraform variable files
• Added !*.tfvars.example exception to preserve template files for developer reference

# Terraform variable files (keep example files)
*.tfvars
!*.tfvars.example

This prevents future sensitive data leakage while maintaining example configurations. Note: existing tracked *.tfvars files remain in history and must be removed separately if needed.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add .gitignore rule for Terraform variable files to prevent sensitive data leakage</issue_title>
<issue_description>## Problem Description

The current .gitignore file is missing rules to ignore Terraform variable files (*.tfvars). These files typically contain sensitive information such as:

• API keys and secrets
• Service principal credentials
• Other sensitive configuration data

Without adding these files to .gitignore, sensitive information may be accidentally committed to the repository.

Proposed Solution

Add the following rules to the Terraform section of .gitignore:
tignore

Terraform variable files (keep example files)

.tfvars
!.tfvars.exampleThis rule will:

• ✅ Ignore all *.tfvars files (containing sensitive information)
• ✅ Keep *.tfvars.example files (as templates for other developers)
  </issue_description>

<agent_instructions>Please add a .gitignore file and replace any existing unreasonable files.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Add .gitignore rule for Terraform variable files to prevent sensitive data leakage #125

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