app.py

from flask import Flask, jsonify, request 

app = Flask(__name__)

@app.route('/')
def home():
    return jsonify({
        'author': 'Phạm Quốc Cường'
    })

@app.errorhandler(404)
def not_found(error):
    return jsonify({
        "author":"Phạm Quốc Cường",
        "link":"https://www.facebook.com/pqc2304"
    }), 404