flask minimal app

# Step 1: Import the Flask module
from flask import Flask

# Step 2: Create an instance of the Flask class
app = Flask(__name__)

# Step 3: Define a route and its corresponding function
@app.route('/')
def hello_world():
    return 'Hello, World!'

# Step 4: Run the Flask application
if __name__ == '__main__':
    app.run()