helloFlask.py

from flask import Flask, request, send_from_directory
# set the project root directory as the static folder, you can set others.
app = Flask(__name__, static_url_path='')

@app.route('/<path:path>')
def send_js(path):
    return send_from_directory('', path)

@app.route('/')
def index():
    return send_from_directory('','index.html')

@app.route("/hello")
def hello():
    return "Hello World!"