Webapps and file structure

I would like to create a webapp which I have developed locally. The file structure is below. It appears that standard webapps have a simplified interface with tabs for CSS/js/python etc. Is there a way to create a webapp that will allow me to maintain my file structure without rewriting it to fit the rigid structure of a standard webapp interface

webapp/

├── app.py

├── static/

│ ├── style.css

│ ├── script.js

│ └── browse.js

└── templates/

├── index.html

└── browse.html