Goblin is a web application that serves as a Go binary distribution service, allowing users to download and install Go binaries without having Go installed locally. The application consists of a Go-based HTTP server that resolves package versions from the Go proxy and GitHub, compiles binaries for requested OS/architecture combinations, and serves them to users. It includes a web frontend for documentation and usage examples, Docker configuration for easy deployment, and optional caching via S3-compatible storage. The architecture follows a standard web service pattern with clear separation between API handling, version resolution, binary building, and storage layers.