build(bake): specify local and remote bake definitions

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

content/build/bake/remote-definition.md

@@ -129,3 +129,53 @@ $ docker buildx bake "https://github.com/tonistiigi/buildx.git#remote-test" "htt
 #8 0.136 -rwxrwxrwx    1 root     root          9620 Jul 27 18:31 vendor.conf
 #8 0.136 /bin/sh: stop: not found
 ```
+
+## Remote definition with the --file flag
+
+You can also specify the Bake definition to load from the remote repository,
+using the `--file` or `-f` flag:
+
+```console
+docker buildx bake -f bake.hcl "https://github.com/crazy-max/buildx.git#remote-with-local"
+```
+
+```text
+...
+#4 [2/2] RUN echo "hello world"
+#4 0.270 hello world
+#4 DONE 0.3s
+```
+
+If you want to use a combination of local and remote definitions, you can
+specify a local definition using the `cwd://` prefix with `-f`:
+
+```hcl
+# local.hcl
+target "default" {
+  args = {
+    HELLO = "foo"
+  }
+}
+```
+
+```console
+docker buildx bake -f bake.hcl -f cwd://local.hcl "https://github.com/crazy-max/buildx.git#remote-with-local" --print
+```
+
+```json
+{
+  "target": {
+    "default": {
+      "context": "https://github.com/crazy-max/buildx.git#remote-with-local",
+      "dockerfile": "Dockerfile",
+      "args": {
+        "HELLO": "foo"
+      },
+      "target": "build",
+      "output": [
+        "type=cacheonly"
+      ]
+    }
+  }
+}
+```