builder/docker: reference to docker docs regarding capabilities

builder/docker/config.go

@@ -46,9 +46,13 @@ type Config struct {
 	// the [artifice
 	// post-processor](/docs/post-processors/artifice).
 	Discard bool `mapstructure:"discard" required:"true"`
-	// An array of additional Linux capabilities to grant to the container.
+	// An array of additional [Linux
+	// capabilities](https://docs.docker.com/engine/reference/run/#runtime-privilege-and-linux-capabilities)
+	// to grant to the container.
 	CapAdd []string `mapstructure:"cap_add" required:"false"`
-	// An array of Linux capabilities to drop from the container.
+	// An array of [Linux
+	// capabilities](https://docs.docker.com/engine/reference/run/#runtime-privilege-and-linux-capabilities)
+	// to drop from the container.
 	CapDrop []string `mapstructure:"cap_drop" required:"false"`
 	// Username (UID) to run remote commands with. You can also set the group
 	// name/ID if you want: (UID or UID:GID). You may need this if you get

website/pages/partials/builder/docker/Config-not-required.mdx

@@ -13,9 +13,13 @@
 - `device` ([]string) - An array of devices which will be accessible in container when it's run
   without `--privileged` flag.
 
-- `cap_add` ([]string) - An array of additional Linux capabilities to grant to the container.
+- `cap_add` ([]string) - An array of additional [Linux
+  capabilities](https://docs.docker.com/engine/reference/run/#runtime-privilege-and-linux-capabilities)
+  to grant to the container.
 
-- `cap_drop` ([]string) - An array of Linux capabilities to drop from the container.
+- `cap_drop` ([]string) - An array of [Linux
+  capabilities](https://docs.docker.com/engine/reference/run/#runtime-privilege-and-linux-capabilities)
+  to drop from the container.
 
 - `exec_user` (string) - Username (UID) to run remote commands with. You can also set the group
   name/ID if you want: (UID or UID:GID). You may need this if you get