Create Flask app factory

[wklumpen]

Description

Set up main Flask application with CORS, error handlers, and basic configuration.

Tasks

• Create create_app() function in spur/api/server.py
• Set up CORS for React frontend (localhost:3000)
• Add error handlers (404, 500, 400, 501)
• Create /health endpoint returning {"status": "ok"}
• Add basic logging configuration
• Add config for development/production modes

Acceptance Criteria

• Server runs on localhost:5000 with flask run
• /health returns 200 OK with JSON response
• CORS configured for localhost:3000
• Error handlers return proper JSON responses
• Logging outputs to console

Time Estimate

2 hours

Dependencies

• Depends on Create API module structure #90

Files Changed

• spur/api/server.py
• spur/api/__init__.py

Testing

python -m spur.api.server
curl http://localhost:5000/health