Fix Fly.io deployment error and add ChatGPT integration documentation

[Copilot]

The SGEX MCP service deployment to Fly.io was failing with the error "No access token available. Please login with 'flyctl auth login'" due to missing GitHub repository secrets configuration. This PR resolves the deployment issue and provides comprehensive documentation for ChatGPT integration.

Changes Made

Fixed Deployment Workflow

Enhanced .github/workflows/mcp-deployment.yml with comprehensive secret validation:

• Added pre-deployment check for FLYIO_API_TOKEN secret
• Improved error messages with clear fix instructions
• Added Fly.io authentication verification step
• Graceful handling of missing OAuth secrets with warnings instead of failures

Documentation Suite

Created comprehensive documentation for the MCP service deployment and integration:

CHATGPT_INTEGRATION.md - Complete ChatGPT developer mode integration guide:

• Step-by-step setup process for ChatGPT Plus users
• GitHub OAuth authentication flow explanation
• Service architecture and security model
• Troubleshooting common integration issues

DEPLOYMENT_RESOLUTION_SUMMARY.md - Comprehensive issue analysis and resolution:

• Root cause analysis of the deployment error
• Complete setup process with required secrets
• Security model and data protection explanation
• Quick reference troubleshooting guide

Enhanced DEPLOYMENT.md - Improved troubleshooting section:

• Specific solution for "No access token available" error
• OAuth configuration error handling
• Collaborator access issue resolution
• Emergency procedures and quick fixes

Validation and Testing

Added test-deployment-setup.sh validation script that:

• Verifies local build process
• Checks required files and configuration
• Tests environment variable setup
• Provides deployment readiness checklist

CORS Configuration Explained

The MCP service requires CORS configuration for several critical reasons:

1. GitHub OAuth Flow: Cross-origin requests during authentication callbacks from GitHub
2. Public API Access: REST endpoints that may be called from web applications or ChatGPT
3. ChatGPT Integration: AI services need cross-origin request capabilities
4. Development Flexibility: Local development and testing against deployed service

ChatGPT User Experience

The deployed MCP service enables ChatGPT users to:

• Access real-time DAK (Digital Adaptation Kit) repository information
• Get answers about WHO SMART Guidelines
• Receive DAK component analysis and implementation guidance
• Query FAQ information with up-to-date responses

Authentication Flow: User authenticates via GitHub OAuth, service verifies collaborator status on litlfred/sgex, then ChatGPT gains access to WHO SMART Guidelines knowledge through the MCP service.

Next Steps

To complete the deployment, configure these GitHub repository secrets:

• FLYIO_API_TOKEN - Fly.io authentication token
• FLYIO_CLIENT_ID_DEV - GitHub OAuth Client ID
• FLYIO_CLIENT_SECRET_DEV - GitHub OAuth Client Secret
• FLYIO_GH_PAT_DEV - GitHub Personal Access Token

The enhanced deployment workflow will now provide clear guidance if any secrets are missing and handle the configuration gracefully.

Fixes #1024.

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[litlfred]

deployment error:

[litlfred]

deoployment error:

ho "🔍 Checking deployment prerequisites..."
🔍 Checking deployment prerequisites...
❌ Error: FLYIO_API_TOKEN secret is not configured
To fix this deployment error, please:
1. Generate a Fly.io API token: fly auth token
2. Add it to GitHub repository secrets as FLYIO_API_TOKEN
3. Go to: Settings → Secrets and variables → Actions
For detailed setup instructions, see:
- services/dak-faq-mcp/DEPLOYMENT.md
- services/dak-faq-mcp/SECRET_MANAGEMENT.md
Error: Process completed with exit code 1.

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