Create snyk-container.yml (#28)

Add Snyk container vulnerability checker

.github/workflows/snyk-container.yml

@@ -0,0 +1,32 @@
+name: Snyk Container
+
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: '37 6 * * *'
+
+permissions:
+  contents: read
+
+jobs:
+  snyk:
+    permissions:
+      contents: read
+      security-events: write
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Build a Docker image
+      run: docker build -t your/image-to-test .
+    - name: Run Snyk to check Docker image for vulnerabilities
+      continue-on-error: true
+      uses: snyk/actions/docker@14818c4695ecc4045f33c9cee9e795a788711ca4
+      env:
+        SNYK_TOKEN: ${{ secrets.SNYK_TOKEN }}
+      with:
+        image: your/image-to-test
+        args: --file=Dockerfile --org=${{ vars.SNYK_ORG }}
+    - name: Upload result to GitHub Code Scanning
+      uses: github/codeql-action/upload-sarif@v2
+      with:
+        sarif_file: snyk.sarif