Swapped from Docker to composite.

Author: WildCard65

Dockerfile

@@ -6,6 +6,18 @@ branding:
   icon: 'check-circle'
   color: 'green'
 
+inputs:
+  source-dir:
+    description: 'The folder containing the source files to format'
+    required: true
+    default: './'
+
 runs:
-  using: 'docker'
-  image: 'Dockerfile'
+  using: 'composite'
+  steps:
+    - id: install-yapf
+      run: pip install yapf
+      shell: bash
+    - id: invoke-yapf
+      run: yapf --diff --recursive ${{ inputs.source-dir }} $*
+      shell: bash