feat: add GitHub Actions workflow for automatic GitHub Pages deployment

[NotYuSheng]

Summary

Implement automatic GitHub Pages deployment using GitHub Actions to eliminate manual deployment steps and ensure the live site stays synchronized with the main branch.

Changes Made

• New File: .github/workflows/deploy-gh-pages.yml
  • Automatically deploys React frontend to GitHub Pages on every push to main branch
  • Supports manual triggering via workflow_dispatch for on-demand deployments
  • Uses Node.js 18 with npm caching for optimal build performance
  • Includes proper permissions and security configurations for Pages deployment

Technical Implementation

• Trigger Events:

  • Automatic: Every push to main branch
  • Manual: Can be triggered from GitHub Actions tab

• Build Process:

  • Installs dependencies with npm ci for consistent builds
  • Builds React app using npm run build
  • Deploys build output from frontend/build directory

• Security & Performance:

  • Uses latest GitHub Actions with proper permissions
  • Implements concurrency controls to prevent conflicting deployments
  • Includes npm caching to speed up builds

Configuration Required

After merging this PR, configure GitHub Pages in repository settings:

1. Go to Settings → Pages
2. Set Source to "GitHub Actions" (not "Deploy from a branch")
3. The workflow will automatically deploy on the next push to main

Benefits

• ✅ Automatic Updates: GitHub Pages updates automatically when main branch changes
• ✅ No Manual Steps: Eliminates need to manually run npm run deploy
• ✅ Consistent Deployments: Same build environment every time
• ✅ Fast Builds: npm caching reduces build times
• ✅ Manual Override: Can trigger deployments manually when needed

Test Plan

• Workflow file syntax validated
• Proper permissions configured for Pages deployment
• Build steps tested with current frontend setup
• Manual trigger capability included

Deployment URL

Once configured, the site will be available at: https://notyusheng.github.io/MeetMemo/

🤖 Generated with Claude Code

[gemini-code-assist]

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