Flask not finding root to / -404

Hello Im new to flask and python, i tried redirecting my script to go to something.html as it was apresenting a 404 i decided to run a hello world and did not work.

Not Found

The requested URL was not found on the server. If you entered the URL manually please check your spelling and try again.

http://localhost:5500/hello

from flask import Flask
from flask import request
from flask import url_for
from flask import redirect
from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__)
app.debug = True
app.config['SQLALCHEMY_DATABASE_URI']=         'postgre://postgres:*****@localhost/web'
db = SQLAlchemy(app)

class Rent(db.Model):
id = db.Column(db.Integer, primary_key=True)
email = db.Column(db.String(200) , unique=True)
sug1 = db.Column(db.String(200) , unique =True)
sug2 = db.Column(db.String(200) , unique = True)
sug3 = db.Column(db.String(200), unique = True)



def __init__ (self,email,sug1,sug2,sug3):
    self.email = email
    self.sug1 = sug1
    self.sug2 = sug2
    self.sug3 = sug3


def __repr__(self):
    return '<User %>' % self.email


    @app.route('/hello')
    def index():
        return "Hello"



@app.route('/resumo', methods=['POST'])
def pesquisa():
    rent = Rent(request.form['email'],request.form['sug1'],request.form['sug2'],request.form['sug3'])
    db.session.add(rent)
    db.session.commit()
    return redirect(url_for('index')) 

if __name__ == "__main__":
        app.run(port=5500)