embed Directive (//go:embed)

Shipping a Go program used to mean shipping the binary plus a folder of HTML templates, CSS, SQL migrations, and config defaults that the program loaded at runtime. Lose one of those files in the wrong directory and the service refused to start. Go 1.16 added the //go:embed directive so the compiler can bake those files directly into the binary, turning deployment back into "copy one executable and run it." This lesson covers how //go:embed works, the three target types it supports, the pattern rules and constraints, and the standard library APIs that consume the result.