<filename>web/__init__.py
from flask import Flask, Blueprint
from config import *

app = Flask(__name__, static_url_path="", static_folder=static_dir)

blueprint = Blueprint('site', __name__, static_folder='static/site')
app.register_blueprint(blueprint)

from web import views
<filename>web/__init__.py
from flask import Flask, Blueprint
from config import *

app = Flask(__name__, static_url_path="", static_folder=static_dir)

blueprint = Blueprint('site', __name__, static_folder='static/site')
app.register_blueprint(blueprint)

from web import views