missing usage for dap command

Signed-off-by: CrazyMax <[email protected]>

Author: crazy-max

docs/reference/buildx.md

@@ -16,7 +16,7 @@ Extended build capabilities with BuildKit
 | [`bake`](buildx_bake.md)                                                     | Build from a file                          |
 | [`build`](buildx_build.md)                                                   | Start a build                              |
 | [`create`](buildx_create.md)                                                 | Create a new builder instance              |
-| [`dap`](buildx_dap.md)                                                       |                                            |
+| [`dap`](buildx_dap.md)                                                       | Debug Adapter Protocol server              |
 | [`debug-shell`](buildx_debug-shell.md)                                       | Start a monitor                            |
 | [`du`](buildx_du.md)                                                         | Disk usage                                 |
 | [`imagetools`](buildx_imagetools.md)                                         | Commands to work on images in registry     |

docs/reference/buildx_dap.md

@@ -1,6 +1,8 @@
 # docker buildx dap
 
 <!---MARKER_GEN_START-->
+Debug Adapter Protocol server
+
 ### Options
 
 | Name        | Type     | Default | Description                              |

monitor/dap/cmd.go

@@ -33,6 +33,7 @@ func AttachContainerCmd(dockerCli command.Cli) *cobra.Command {
 func Cmd(dockerCli command.Cli) *cobra.Command {
 	cmd := &cobra.Command{
 		Use:    "dap",
+		Short:  "Debug Adapter Protocol server",
 		Hidden: true, // hidden command; we need it for emacs DAP support
 		RunE: func(cmd *cobra.Command, args []string) error {
 			logrus.SetOutput(os.Stderr)