Update README

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

README.md

@@ -16,5 +16,5 @@ Basic usage available in [example](example) folder.
 
 ## Contributing
 
-Want to contribute to Buildx? Awesome! You can find information about
-contributing to this project in the [CONTRIBUTING.md](/.github/CONTRIBUTING.md)
+Want to contribute? Awesome! You can find information about contributing to
+this project in the [CONTRIBUTING.md](/.github/CONTRIBUTING.md)

docgen.go

@@ -1,3 +1,48 @@
+// Doc generator specially crafted for Docker CLI plugins.
+//
+// Get started (buildx CLI):
+//  package main
+//
+//  import (
+//  	"log"
+//  	"os"
+//  	"path/filepath"
+//
+//  	"github.com/docker/buildx/commands"
+//  	"github.com/docker/cli/cli/command"
+//  	"github.com/docker/docgen"
+//  	"github.com/spf13/cobra"
+//  )
+//
+//  const sourcePath = "docs/reference/"
+//
+//  func main() {
+//  	log.SetFlags(0)
+//
+//  	dockerCLI, err := command.NewDockerCli()
+//  	if err != nil {
+//  		log.Printf("ERROR: %+v", err)
+//  	}
+//
+//  	cmd := &cobra.Command{
+//  		Use:               "docker [OPTIONS] COMMAND [ARG...]",
+//  		Short:             "The base command for the Docker CLI.",
+//  		DisableAutoGenTag: true,
+//  	}
+//
+//  	cmd.AddCommand(commands.NewRootCmd("buildx", true, dockerCLI))
+//  	docgen.DisableFlagsInUseLine(cmd)
+//
+//  	cwd, _ := os.Getwd()
+//  	source := filepath.Join(cwd, sourcePath)
+//
+//  	if err = os.MkdirAll(source, 0755); err != nil {
+//  		log.Printf("ERROR: %+v", err)
+//  	}
+//  	if err = docgen.GenTree(cmd, source); err != nil {
+//  		log.Printf("ERROR: %+v", err)
+//  	}
+//  }
 package docgen
 
 import (