docs: Add nginx example to demonstrate helm-values-manager usage

[ritwik-g]

User description

Related Issues

N/A - Adding example documentation

Changes Made

• Add example directory with Bitnami nginx chart demonstration
• Create comprehensive README with step-by-step guide
• Add .gitignore for generated files
• Include common.yaml for base configuration
• Demonstrate value management for staging and production environments
• Show validation capabilities with intentionally missing values
• Include cleanup instructions

Testing Done

• Manually tested all commands in the example
• Updated documentation
• Added unit tests (N/A - documentation only)
• Added integration tests (N/A - documentation only)

Checklist

• I have read the CONTRIBUTING guidelines
• My code follows the project's style guidelines
• I have updated the documentation accordingly
• My commits follow the project's commit message convention

Type of Change

• Documentation
• Feature
• Bug Fix
• Performance Improvement
• Code Style Update
• Refactoring
• CI/CD
• Other

Breaking Change

• No
• Yes

Additional Information

This PR adds a practical example to help users understand how to use helm-values-manager effectively. The example demonstrates:

1. Managing values across environments
2. Validating required configurations
3. Using common base values
4. Proper cleanup procedures

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PR Type

Documentation

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Description

• Added a comprehensive example for helm-values-manager usage.

• Demonstrated staging and production environment configurations.

• Included validation and cleanup instructions for better usability.

• Provided detailed README with step-by-step guidance.

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Changes walkthrough 📝

Relevant files

Documentation

README.md Added README for helm-values-manager nginx example              example/nginx/README.md Added a detailed README for the nginx example. Demonstrated staging and production configurations. Included validation and cleanup instructions. Provided step-by-step usage guide for helm-values-manager. +199/-0  common.yaml Added base configuration for nginx example                              example/nginx/common.yaml Added base configuration file for nginx example. Defined common values for nginx image and metrics. +11/-0

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PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 1 🔵⚪⚪⚪⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Best Practice Using 'latest' tag for container images is not recommended in production as it makes deployments unpredictable and harder to rollback. Consider using a specific version tag instead. tag: latest

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PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Impact
General	Use specific version instead of latest Avoid using 'latest' tag for container images in production as it makes deployments unpredictable and harder to rollback. Use a specific version instead. example/nginx/common.yaml [1-6] nginx: image: registry: docker.io repository: bitnami/nginx - tag: latest + tag: 1.25.3 pullPolicy: IfNotPresent Apply this suggestion Suggestion importance[1-10]: 9 __ Why: Using 'latest' tag in container images is a critical issue as it can lead to unexpected behavior, deployment inconsistencies, and difficult rollbacks. Specifying a fixed version is essential for production stability and reproducibility.	High
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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud