platforms input

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

action.yml

@@ -32,6 +32,9 @@ inputs:
   endpoint:
     description: 'Optional address for docker socket or context from `docker context ls`'
     required: false
+  platforms:
+    description: 'Fixed platforms for current node. If not empty, values take priority over the detected ones'
+    required: false
   config:
     description: 'BuildKit config file'
     required: false