build: add docker driver guide

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

_data/toc.yaml

@@ -1406,6 +1406,8 @@ manuals:
           section:
             - path: /build/buildx/drivers/
               title: Overview
+            - path: /build/buildx/drivers/docker/
+              title: Docker driver
             - path: /build/buildx/drivers/docker-container/
               title: Docker container driver
             - path: /build/buildx/drivers/kubernetes/

build/buildx/drivers/docker.md

@@ -0,0 +1,7 @@
+---
+title: "Docker driver"
+keywords: build, buildx, driver, builder, docker
+fetch_remote:
+  line_start: 2
+  line_end: -1
+---

build/buildx/index.md

@@ -40,7 +40,7 @@ run, and have different feature sets.
 
 We currently support the following drivers:
 
-* The `docker` driver ([reference](/engine/reference/commandline/buildx_create/#driver))
+* The `docker` driver ([guide](drivers/docker.md), [reference](/engine/reference/commandline/buildx_create/#driver))
 * The `docker-container` driver ([guide](drivers/docker-container.md), [reference](/engine/reference/commandline/buildx_create/#driver))
 * The `kubernetes` driver ([guide](drivers/kubernetes.md), [reference](/engine/reference/commandline/buildx_create/#driver))
 * The `remote` driver ([guide](drivers/remote.md))