Add comprehensive GitHub Copilot instructions for static site development

[Copilot]

Created a comprehensive .github/copilot-instructions.md file that provides detailed guidance for GitHub Copilot coding agents working with this GitHub Pages repository. The instructions cover the complete development workflow for static websites with HTML, CSS, and JavaScript.

Key Features

Validated Workflows: All commands and procedures have been thoroughly tested and validated to ensure they work correctly every time, including:

• Local development server setup using Python's built-in HTTP server
• HTML validation using the html-validate npm package
• JavaScript linting with modern ESLint v9 configuration
• End-to-end browser testing with Playwright automation
• Manual validation scenarios for complete user workflows

Comprehensive Coverage: The instructions address critical questions that save development time:

• Exact commands for building and testing (no build system required for static sites)
• Timeout recommendations with explicit "NEVER CANCEL" warnings for long-running operations
• Manual testing scenarios to validate functionality after changes
• Directory structure recommendations for organized development
• GitHub Pages deployment process and timing expectations
• Common troubleshooting scenarios and solutions

Practical Examples: Includes working code templates and file structure examples that demonstrate best practices for HTML, CSS, and JavaScript development.

Browser Automation: Instructions include comprehensive browser testing workflows using Playwright to ensure changes work correctly in real browsers, with screenshot validation capabilities.

The instructions follow an imperative tone ("Run this command", "Do not do this") and start with a firm directive to always reference the instructions first before falling back to additional search or context gathering.

Also included an example index.html file demonstrating proper structure and functionality that serves as both documentation and a starting point for development.

Screenshots

Validation Testing

Working Website Example

Fixes #2.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• thephoenixagency.github.io
  • Triggering command: curl -s -o /dev/null -w %{http_code} REDACTED (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[Copilot]

@EthanThePhoenix38 👋 This repository doesn't have Copilot instructions. With Copilot instructions, I can understand the repository better, work faster and produce higher quality PRs.

I can generate a .github/copilot-instructions.md file for you automatically. Click here to open a pre-filled issue and assign it to me. I'll write the instructions, and then tag you for review.

[Copilot]

Copilot wasn't able to review any files in this pull request.

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