Initial commit (docker/build-push-action#87)

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

action.yml

@@ -0,0 +1,41 @@
+# https://help.github.com/en/articles/metadata-syntax-for-github-actions
+name: 'Docker Setup Buildx'
+description: 'Set up Docker Buildx'
+author: 'docker'
+branding:
+  icon: 'anchor'
+  color: 'blue'
+
+inputs:
+  version:
+    description: 'Buildx version. e.g. v0.3.0'
+    required: false
+  driver:
+    description: 'Sets the builder driver to be used'
+    default: 'docker-container'
+    required: false
+  driver-opt:
+    description: 'Passes additional driver-specific options. Eg. image=moby/buildkit:master'
+    required: false
+  buildkitd-flags:
+    description: 'Flags for buildkitd daemon'
+    required: false
+  install:
+    description: 'Sets up docker build command as an alias to docker buildx'
+    default: 'false'
+    required: false
+  use:
+    description: 'Switch to this builder instance'
+    default: 'true'
+    required: false
+
+outputs:
+  name:
+    description: 'Builder instance name'
+  platforms:
+    description: 'Available platforms (comma separated)'
+
+runs:
+  using: 'node12'
+  main: 'dist/index.js'
+  post: 'dist/index.js'