docs: Custom Backend/Worker Guide (#608)

deploy/dynamo/sdk/docs/sdk/README.md

@@ -90,7 +90,9 @@ Dynamo follows a class-based architecture similar to BentoML making it intuitive
 1. Class attributes for dependencies using `depends()`
 2. An `__init__` method for standard initialization
 3. Optional lifecycle hooks like `@async_on_start` and `@async_on_shutdown`
-4. Endpoints defined with `@dynamo_endpoint()`
+4. Endpoints defined with `@dynamo_endpoint()`. Optionally, an endpoint can be given a name
+   via `@dynamo_endpoint("my_endpoint_name")`, but otherwise will default to the name of the
+   function being decorated if omitted.
 
 This approach provides a clean separation of concerns and makes the service structure easy to understand.