The blog post, authored by an experienced developer transitioning from REST to gRPC in Golang, explores building a gRPC gateway to handle HTTP requests and proxy them to a gRPC service. The author outlines three methods: using grpc-gateway to create a proxy for existing gRPC services, developing a REST service that shares implementation with the gRPC service, and creating a unified service that handles both REST and gRPC requests on the same port. The post also delves into technical aspects such as generating TLS certificates for secure connections, explaining the role of HTTP/2 in gRPC communication, and using OpenAPI specifications to create a language-agnostic interface for RESTful APIs. Throughout the article, the author emphasizes the ease of building these solutions using the Earthly build tool and provides code snippets and insights into managing TLS and HTTP/2 protocols. The article concludes with a reflection on the practicality of combining REST and gRPC in a single service, referencing real-world applications like etcd and Istio, and encourages readers to further explore build process simplification with Earthly.