from flask import render_template

def init_app(app):
    """
    Register core application routes directly on the Flask app:
      - GET  /         → home page
      - GET  /health   → health check
    """
    @app.route('/')
    def home():
        return render_template('core/home.html')

    @app.route('/health')
    def health():
        return 'OK', 200