diff --git a/.github/actions/action.yaml b/.github/actions/action.yaml
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index 0000000..90f276d
--- /dev/null
+++ b/.github/actions/action.yaml
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+name: "Hello World"
+description: "Greet someone and record the time"
+inputs:
+  who-to-greet: # id of input
+    description: "Who to greet"
+    required: true
+    default: "World"
+outputs:
+  time: # id of output
+    description: "The time we greeted you"
+
+runs:
+  using: "docker"
+  image: "Dockerfile"
+  args:
+    - ${{ inputs.who-to-greet }}
diff --git a/Dockerfile b/Dockerfile
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index 0000000..9a86c73
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+++ b/Dockerfile
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+FROM alpine:3.10
+
+COPY entrypoint.sh /entrypoint.sh
+
+ENTRYPOINT [ "./entrypoint.sh" ]
diff --git a/README.md b/README.md
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+++ b/README.md
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+# Hello world docker action
+
+This action prints "Hello World" or "Hello" + the name of a person to greet to the log.
+
+## Inputs
+
+## `who-to-greet`
+
+**Required** The name of the person to greet. Default `"World"`.
+
+## Outputs
+
+## `time`
+
+The time we greeted you.
+
+## Example usage
+
+uses: actions/hello-world-docker-action@v2
+with:
+  who-to-greet: 'Mona the Octocat'
diff --git a/entrypoint.sh b/entrypoint.sh
old mode 100755
new mode 100644