Frontend code

from flask import Flask, render_template, redirect, url_for, request,make_response
from pymongo import MongoClient
import socket
import os

app = Flask(__name__)

MONGODB_HOST=os.environ['MONGODB_HOST']
client = MongoClient(MONGODB_HOST, 27017)
db = client.rsvpdata

@app.route('/')
def rsvp():
        _items = db.rsvpdata.find()
        items = [item for item in _items]
        count = len(items)

        hostname = socket.gethostname()

        return render_template('profile.html', counter=count, hostname=hostname, items=items)


@app.route('/new', methods=['POST'])
def new():
        item_doc = {'name': request.form['name'], 'email': request.form['email']}
        db.rsvpdata.insert_one(item_doc)
        return redirect(url_for('rsvp'))

if __name__ == '__main__':
        app.run(host='0.0.0.0', debug=True)

client.close()