Migrate deployment from Netlify to GitHub Pages #205

🧾 Title

Migrate deployment from Netlify to GitHub Pages

🧠 Summary

Netlify free tier exhausted its build minutes at the start of the month. GitHub Pages is the natural replacement: it is free, integrates directly with the existing GitHub Actions CI/CD pipeline, and aligns with the broader move toward GitHub-native tooling. This ticket covers the near-term migration.

📦 Scope

• Add a GitHub Actions deploy workflow that builds the Vite/React app using actions/configure-pages, actions/upload-pages-artifact, and actions/deploy-pages
• Configure the GitHub repo to serve GitHub Pages from the correct branch/directory
• Update any environment variables or secrets currently in Netlify to GitHub Actions secrets
• Verify custom domain (if any) points to GitHub Pages instead of Netlify
• Remove or disable Netlify configuration (netlify.toml, Netlify env vars) once GH Pages is confirmed working
• Update README/docs references from Netlify to GitHub Pages

🚫 Out of Scope

• Any changes to the app itself (no feature work)
• Setting up staging/preview environments (follow-up ticket)
• Migrating Netlify form handling or serverless functions (MusterDeck does not use them)

✅ Acceptance Criteria

• App builds and deploys via GitHub Actions on every merge to main
• Deployed site is accessible via GitHub Pages URL (or custom domain)
• No Netlify dependency remains in the CI/CD pipeline
• All required environment variables are present as GitHub Actions secrets

🧪 Testing / Validation

• Merge to main triggers the deploy workflow and it passes
• Visit the deployed URL and verify the app loads correctly
• Auth flows work on the deployed site (Supabase redirect URLs updated if needed)

🧰 Implementation Notes

• GitHub Pages with Vite requires setting base in vite.config.ts if deploying to a subpath (e.g. //); not needed for a custom domain at root
• Supabase auth redirect URLs will need to be updated in the Supabase dashboard to point to the new Pages URL

🧰 Notes / Links

• Parent epic: Infrastructure & Tooling #198 Infrastructure and Tooling
• Netlify free tier exhausted at start of month -- immediate need

✅ Addendum: Bugs Found/Fixed

⏳ Addendum: Pending