initial docker action

Dockerfile

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+FROM alpine:3.10
+
+COPY entrypoint.sh /entrypoint.sh
+
+RUN 
+
+ENTRYPOINT ["/entrypoint.sh"]

action.yml

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+name: docker action
+
+description: docker action description
+
+inputs:
+  name:
+    required: false
+    description: your name
+    default: Nemo
+
+outputs:
+  message:
+    description: greeting message
+
+runs:
+  using: docker
+  image: Dockerfile
+  args:
+   - ${{inputs.name}}

entrypoint.sh

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+#!/bin/sh -l
+
+echo "Hello $1"
+time=$(date)
+echo "message=Hello $1, time: $time" >> $GITHUB_OUTPUT
+