Fix workflows: remove reference to non-existent set_environment job and add staging support

[Copilot]

Both build_deploy.yml and check_links.yml reference needs.set_environment.outputs.data_branch but no set_environment job exists, causing workflow failures. Additionally, build_deploy.yml was missing the staging branch trigger and both workflows had hardcoded environment configurations.

Changes

• Replace needs.set_environment.outputs.data_branch with conditional expression based on github.ref
• Expression maps refs/heads/staging → staging branch, defaults to main for all other refs
• Applied to both build_deploy.yml and check_links.yml workflows
• Add staging to trigger branches in build_deploy.yml to match check_links.yml
• Make environment names and URLs conditional based on branch

# Before (data branch reference)
ref: ${{ needs.set_environment.outputs.data_branch }}

# After  
ref: ${{ github.ref == 'refs/heads/staging' && 'staging' || 'main' }}

# Before (build_deploy.yml triggers)
on:
  push:
    branches:
    - main

# After (build_deploy.yml triggers)
on:
  push:
    branches:
    - main
    - staging

# Before (environment configuration)
environment:
  name: production
  url: https://www.ituob.org

# After (conditional environment)
environment:
  name: ${{ github.ref == 'refs/heads/staging' && 'staging' || 'production' }}
  url: ${{ github.ref == 'refs/heads/staging' && 'https://staging-www.ituob.org' || 'https://www.ituob.org' }}

This aligns with the documented behavior where production deploys from itu-ob-data@main to https://www.ituob.org and staging deploys from itu-ob-data@staging to https://staging-www.ituob.org. Both workflows now trigger on both main and staging branches and use the appropriate GitHub environment configuration for each deployment target.

Original prompt

Fix the code for the build_deploy workflow

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[ronaldtse]

@copilot continue fixing

[Copilot]

@copilot continue fixing

Completed the fix. Added staging branch trigger to build_deploy workflow in commit 3f06ece.

The workflow now:

• Triggers on both main and staging branches
• Uses correct data branch (itu-ob-data@staging for staging, itu-ob-data@main otherwise)
• Deploys to GitHub Pages only on main branch

Both workflows are now consistent and match the documented behavior in README.

[ronaldtse]

@copilot fix the remaining issues for deployment

[Copilot]

@copilot fix the remaining issues for deployment

Fixed deployment environment configuration in commit 791bf42.

Both workflows now use conditional environments based on the branch:

• staging branch → uses 'staging' environment with staging-www.ituob.org URL
• main branch → uses 'production' environment with www.ituob.org URL

This allows GitHub environment protection rules and configurations to work correctly for each deployment target.