diff --git a/hello-world-docker-action/action.yml: b/hello-world-docker-action/action.yml:
new file mode 100644
index 0000000..7ab22ab
--- /dev/null
+++ b/hello-world-docker-action/action.yml:
@@ -0,0 +1,15 @@
+name: 'Hello World Docker Action'
+description: 'Say hello to a user or the world.'
+inputs:
+  who-to-greet:
+    description: 'Who to greet'
+    required: true
+    default: 'world'
+outputs:
+  time:
+    description: 'The time we said hello.'
+runs:
+  using: 'docker'
+  image: 'Dockerfile'
+  args:
+    - ${{ inputs.who-to-greet }}