Do you mean that you are fetching data from an internal API and sending server-rendered HTML response to the browser? I always naively thought GitHub worked this way. Build a GraphQL/REST API that exposes all of your system's internals, query/mutate through it and send an HTML response in the "frontend" (Ruby on Rails etc.). Frontend, but in terms of an application server that in turn accesses everything through an internal API.
Do you mean that you are fetching data from an internal API and sending server-rendered HTML response to the browser? I always naively thought GitHub worked this way. Build a GraphQL/REST API that exposes all of your system's internals, query/mutate through it and send an HTML response in the "frontend" (Ruby on Rails etc.). Frontend, but in terms of an application server that in turn accesses everything through an internal API.