chore: add deployment monitoring via github actions

.github/workflows/deployment-monitor.yml

@@ -0,0 +1,70 @@
+name: Deployment Tests
+
+on:
+  push:
+    branches:
+      - chore/CLI-441_deployment_test
+  schedule:
+    - cron: '0 23 * * *'
+  workflow_dispatch:
+
+jobs:
+  monitor_cdn:
+    name: CDN deployments
+    runs-on: ${{ matrix.os }}-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu]
+        base_url: [static.snyk.io downloads.snyk.io]
+        channel: [stable preview]
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install dependencies
+        run: echo UTC > /etc/timezone && apt update && apt install -y sudo curl
+      - name: Install Snyk
+        run: |
+          date -u
+          rm -f ./snyk
+          curl --retry 2 -L -v --compressed https://<< matrix.base_url >>/cli/<< matrix.channel >>/snyk-linux -o ./snyk-linux
+          curl --retry 2 -L -v --compressed https://<< matrix.base_url >>/cli/<< matrix.channel >>/snyk-linux.sha256 -o ./snyk-linux.sha256
+          echo --- Content shasum file ---
+          cat snyk-linux.sha256
+          echo --- Shasum binary ---
+          sha256sum snyk-linux
+          chmod +x ./snyk-linux
+          echo --- CLI version ---
+          ./snyk-linux --version
+          echo --- Shasum comparison ---
+          sha256sum -c snyk-linux.sha256
+      - name: Run snyk --version
+        run: ./snyk-linux --version
+
+
+  monitor_homebrew:
+    name: Homebrew deployment
+    runs-on: ${{ matrix.os }}-latest
+    strategy:
+        fail-fast: false
+        matrix:
+          os: [ macos ]
+    steps:
+      - name: Install Snyk CLI with homebrew on macOS
+        run: |
+          brew tap snyk/tap
+          brew install snyk
+      - name: Run snyk --version
+        run: snyk --version
+
+  monitor_scoop:
+    name: Scoop deployment
+    runs-on: windows-latest
+    steps:
+      - name: Install scoop on Windows
+        run: |
+          iwr -useb get.scoop.sh -outfile 'install-scoop.ps1'
+          .\install-scoop.ps1 -RunAsAdmin
+          scoop bucket add snyk https://github.com/snyk/scoop-snyk
+          scoop install snyk
+      - name: Run snyk --version
+        run: snyk --version