Convert deployment from Cloudflare Pages to GitHub Pages

[Copilot]

Configures the repository for GitHub Pages deployment with automated CI/CD via GitHub Actions.

Changes

• GitHub Actions workflow (.github/workflows/deploy-pages.yml): Builds site on push to main and deploys public/ directory to GitHub Pages
• Asset path fix: Changed /js/main.js to js/main.js in src/index.js for subpath deployment compatibility
• Build reproducibility: Added package-lock.json and updated .gitignore to support npm ci in CI pipeline
• Documentation: Updated README.md and DEPLOYMENT.md to reflect GitHub Pages as primary deployment method; added GITHUB_PAGES_SETUP.md with configuration steps

Deployment

After merge, enable GitHub Pages in repository Settings > Pages by selecting "GitHub Actions" as the source. Site will deploy to https://owasp-blt.github.io/BLT-on-Cloudflare/

Cloudflare Pages deployment remains available as an alternative via existing wrangler.toml configuration.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>convert this to be BLT on github pages so it shows the homepage on github pages</issue_title>
<issue_description></issue_description>

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

• Fixes convert this to be BLT on github pages so it shows the homepage on github pages #8

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.

[cloudflare-workers-and-pages]

Deploying blt-on-cloudflare with    Cloudflare Pages

Latest commit:	7b13f8b
Status:	✅  Deploy successful!
Preview URL:	https://304c9a92.blt-on-cloudflare.pages.dev
Branch Preview URL:	https://copilot-convert-to-blt-githu.blt-on-cloudflare.pages.dev

View logs