Update README and CODEOWNERS

CODEOWNERS

@@ -0,0 +1,4 @@
+# Repository CODEOWNERS
+
+* @actions/actions-runtime
+* @ncalteen

LICENSE

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-MIT License
 
-Copyright (c) 2019 GitHub Actions
+The MIT License (MIT)
+
+Copyright (c) 2018 GitHub, Inc. and contributors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -9,13 +10,13 @@ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

README.md

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-# Hello world docker action
+# Hello, World! Docker Action
 
-This action prints "Hello World" to the log or "Hello" + the name of a person to greet. To learn how this action was built, see "[Creating a Docker container action](https://docs.github.com/en/actions/creating-actions/creating-a-docker-container-action)" in the GitHub Docs.
+[![GitHub Super-Linter](https://github.com/actions/hello-world-docker-action/actions/workflows/linter.yml/badge.svg)](https://github.com/super-linter/super-linter)
+![CI](https://github.com/actions/hello-world-docker-action/actions/workflows/ci.yml/badge.svg)
+
+This action prints `Hello, World!` or `Hello, <who-to-greet>!` to the log. To
+learn how this action was built, see
+[Creating a Docker container action](https://docs.github.com/en/actions/creating-actions/creating-a-docker-container-action).
+
+## Usage
+
+Here's an example of how to use this action in a workflow file:
+
+```yaml
+name: Example Workflow
+
+on:
+  workflow_dispatch:
+    inputs:
+      who-to-greet:
+        description: Who to greet in the log
+        required: true
+        default: 'World'
+        type: string
+
+jobs:
+  say-hello:
+    name: Say Hello
+    runs-on: ubuntu-latest
+
+    steps:
+      # Change @main to a specific commit SHA or version tag, e.g.:
+      # actions/hello-world-docker-action@e76147da8e5c81eaf017dede5645551d4b94427b
+      # actions/hello-world-docker-action@v1.2.3
+      - name: Print to Log
+        id: print-to-log
+        uses: actions/hello-world-docker-action@main
+        with:
+          who-to-greet: ${{ inputs.who-to-greet }}
+```
+
+For example workflow runs, check out the
+[Actions tab](https://github.com/actions/hello-world-docker-action/actions)!
+:rocket:
 
 ## Inputs
 
-### `who-to-greet`
-
-**Required** The name of the person to greet. Default `"World"`.
+| Input          | Default | Description                     |
+| -------------- | ------- | ------------------------------- |
+| `who-to-greet` | `World` | The name of the person to greet |
 
 ## Outputs
 
-### `time`
+| Output | Description             |
+| ------ | ----------------------- |
+| `time` | The time we greeted you |
 
-The time we greeted you.
+## Test Locally
 
-## Example usage
+After you've cloned the repository to your local machine or codespace, you'll
+need to perform some initial setup steps before you can test your action.
 
-```yaml
-uses: actions/hello-world-docker-action@main
-with:
-  who-to-greet: 'Mona the Octocat'
-```
+> [!NOTE]
+>
+> You'll need to have a reasonably modern version of
+> [Docker](https://www.docker.com/get-started/) handy (e.g. docker engine
+> version 20 or later).
+
+1. :hammer_and_wrench: Build the container
+
+   Make sure to replace `actions/hello-world-docker-action` with an appropriate
+   label for your container.
+
+   ```bash
+   docker build -t actions/hello-world-docker-action .
+   ```
+
+1. :white_check_mark: Test the container
+
+   You can pass individual environment variables using the `--env` or `-e` flag.
+
+   ```bash
+   $ docker run --env INPUT_WHO_TO_GREET="Mona Lisa Octocat" actions/hello-world-docker-action
+   ::notice file=entrypoint.sh,line=7::Hello, Mona Lisa Octocat!
+   ```
+
+   Or you can pass a file with environment variables using `--env-file`.
+
+   ```bash
+   $ cat ./.env.test
+   INPUT_WHO_TO_GREET="Mona Lisa Octocat"
+
+   $ docker run --env-file ./.env.test actions/hello-world-docker-action
+   ::notice file=entrypoint.sh,line=7::Hello, Mona Lisa Octocat!
+   ```