Adding Slack message

.github/workflows/action-send-slack.yml

@@ -0,0 +1,24 @@
+name: Send Slack message
+
+on:
+  workflow_dispatch:
+      inputs:
+         greeting:
+            description: "Please type in your greeting!"
+            required: true
+            default: ''
+
+jobs:
+   Hello-GitHub-Actions:
+      runs-on: ubuntu-latest
+      name: Post to a Slack channel
+
+      steps:
+        - name: Hello, GitHub Actions
+          id: slack
+          uses: slackapi/[email protected]
+          with:
+            channel-id: 'YOUR_SLACK_CHANNEL_ID'
+            slack-message: 'Posting from GitHub Actions! Here is my greeting: ${{ github.event.inputs.greeting }}'
+          env:
+            SLACK_BOT_TOKEN: ${{ secrets.SLACK_TOKEN }}

README.md

@@ -15,6 +15,7 @@ Sample GitHub Actions workflows included in this repo
 | [`.github/workflows/action-multiple-self-hosted-runners.yml`](/.github/workflows/action-multiple-self-hosted-runners.yml) | Example of using multiple runners including self-hosted runners |
 | [`.github/workflows/action-issueops.yml`](/.github/workflows/action-issueops.yml) | Example of IssueOps workflow |
 | [`.github/workflows/action-migrate-containers.yml`](/.github/workflows/action-migrate-containers.yml) | Example of migrating containers from DockerHub to GitHub Container registry |
+| [`.github/workflows/action-send-slack.yml`](/.github/workflows/action-send-slack.yml) | Example of sending a Slack message from Actions |
 
 Sample GitHub Package registry codes included in this repo