completed: TODO-26 --> gunicorn now works

covertype.py

@@ -1,7 +1,7 @@
 from wtforms import SubmitField, StringField, HiddenField, SelectField, validators
 from flask import request, render_template, redirect
 from flask_wtf import FlaskForm
-from __main__ import db, app, ma
+from main import db, app, ma
 from sqlalchemy import Sequence
 from sqlalchemy.exc import SQLAlchemyError
 from status import st, Status