feat: init api module with Flask app and user routes

main.py

@@ -0,0 +1,14 @@
+from flask import Flask, jsonify
+
+app = Flask(__name__)
+
+@app.route('/api/health')
+def health():
+    return jsonify({'status': 'ok', 'module': 'api'})
+
+@app.route('/api/version')
+def version():
+    return jsonify({'version': '1.0.0'})
+
+if __name__ == '__main__':
+    app.run(host='0.0.0.0', port=5000)

requirements.txt

@@ -0,0 +1,2 @@
+flask>=3.0
+gunicorn>=21.2

routes/users.py

@@ -0,0 +1,10 @@
+from flask import jsonify
+
+def register_routes(app):
+    @app.route('/api/users')
+    def list_users():
+        return jsonify({'users': []})
+    
+    @app.route('/api/users/<int:user_id>')
+    def get_user(user_id):
+        return jsonify({'id': user_id, 'name': 'Alice'})