Rename create_app.py to app.py for Gunicorn command

forms.py

@@ -1,7 +1,7 @@
 from flask import Blueprint, flash, redirect, request, url_for
 from flask_login import current_user, login_required
 
-from .create_app import db
+from .app import db
 from .models import User, Post, Comment
 
 blueprint = Blueprint('forms', __name__)