app.py

from flask import Flask, render_template

app = Flask(__name__)
app.jinja_env.variable_start_string = '[['
app.jinja_env.variable_end_string = ']]'

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

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=7860)