chore: add issue opened slack notification action (#171)

Author: regiluze

.github/workflows/issues-slack-notify.yml

@@ -0,0 +1,19 @@
+on:
+  issues:
+    types: [opened]
+name: Issue created Slack Notification
+jobs:
+  slackNotification:
+    name: Slack Notification
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Slack Notification
+        uses: rtCamp/action-slack-notify@v2
+        env:
+          SLACK_CHANNEL: ws-cloudnative-internal
+          SLACK_ICON: https://github.com/fluidicon.png
+          SLACK_MESSAGE: 'An issue has been opened in Terraform Sysdig Provider repository'
+          SLACK_TITLE: Issue Created
+          SLACK_USERNAME: gitHub
+          SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}