app.py

from flask import Flask, render_template, request

app = Flask(__name__)

@app.route("/", methods=["GET", "POST"])
def hello():
    message = ""
    if request.method == "POST":
        name = request.form.get("name")
        if name:
            message = f"Hello, {name}!"
    return render_template("index.html", message=message)

if __name__ == "__main__":
    app.run(host="0.0.0.0", port=7860, debug=False)