how to run the program?

[djabbat]

On Windows 11 and Ubuntu 20, the command

$ go run .

gives the same result:

Usage: SnippetBox [command]

Available Commands: help Help about any command start Start SnippetBox version Show version

Flags: -c, --config string Config file -h, --help help for SnippetBox --version version for SnippetBox

Use "SnippetBox [command] --help" for more information about a command.