use env for more stuff

app.py

@@ -695,5 +695,10 @@ def delete_goal(goal_id):
     db.goals.delete_one({'_id': ObjectId(goal_id), 'user_id': get_user_id()})
     return redirect(url_for('goals'))
 
+debug = os.getenv('DEBUG') == 'False'
+host = os.getenv('HOST')
+port = int(os.getenv('PORT', 80))
+
+
 if __name__ == '__main__':
-    app.run(debug=True)
+    app.run(debug=False, host=host, port=port)