Deploy power-apps portal customization & configuration from Development to Production environment?

Question

We are developing one power-apps portal. We have custom Web Pages, Web Forms, Page Templates, Custom CSS, JavaScript & Image files in the portal. Also having some portal configuration like, Website settings, Entity permissions, Web Roles, Bindings.

I wanted to know about, how to deploy all these portal files, customization & configuration from development environment to production environment?

This MSDN article is related to migrating portal configurations but I want to know about entire portal deployment.

Any help will be appreciated