feat: Added the github actions to send the slack notifications (twilio#164)

* feat: Added the github actions to send the slack notifications

* Update release.yml

Author: ravali-rimmalapudi

.github/workflows/release.yml

@@ -12,6 +12,21 @@ on:
         description: 'HomeBrew prerelease'
         default: 'false'
 jobs:
+  notify-start:
+    name: Notify Release Started
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Slack Notification
+        uses: rtCamp/action-slack-notify@v2
+        env:
+          SLACK_WEBHOOK: ${{ secrets.SLACK_WEB_HOOK }}
+          SLACK_COLOR: "#36a64f"
+          SLACK_USERNAME: CLI Release Bot
+          SLACK_ICON_EMOJI: ":ship:"
+          SLACK_TITLE: "Twilio Cli"
+          SLACK_MESSAGE: 'Release Started :rocket:'
+          MSG_MINIMAL: actions url
   test:
     runs-on: ubuntu-latest
     strategy:
@@ -104,3 +119,20 @@ jobs:
           BRANCH_NAME: ${{github.event.inputs.cli-branch}}
           REPO_NAME: twilio/twilio-cli
           INPUTS: '{ "change-log": ${{ toJSON(needs.update-api-specs.outputs.change-log) }}, "version-type": "${{needs.update-api-specs.outputs.version-type}}", "homebrew-branch": "${{github.event.inputs.homebrew-branch}}", "homebrew-prerelease": "${{github.event.inputs.homebrew-prerelease}}" }'
+  notify-complete-fail:
+    if: ${{ failure() || cancelled() }}
+    needs: [ triggerCliWorkflow ]
+    name: Notify Release Failed
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Slack Notification
+        uses: rtCamp/action-slack-notify@v2
+        env:
+          SLACK_WEBHOOK: ${{ secrets.ALERT_SLACK_WEB_HOOK }}
+          SLACK_COLOR: "#ff3333"
+          SLACK_USERNAME: CLI Release Bot
+          SLACK_ICON_EMOJI: ":ship:"
+          SLACK_TITLE: "Twilio Cli-core"
+          SLACK_MESSAGE: 'Release workflow Failed'
+          MSG_MINIMAL: actions url