create if db specified

app.py

@@ -13,7 +13,8 @@ db.init_app(app)
 # TODO Find a workaround for migrations/db.create_all()
 with app.app_context():
     from models.entity import Entity
-    db.create_all()
+    if app.config["SQLALCHEMY_DATABASE_URI"]:
+        db.create_all()
 
 
 # Serve all static assets for the frontend