[#6] Create snyk pipeline.

.github/workflows/snyk.yml

@@ -0,0 +1,19 @@
+name: Snyk
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Run Snyk to check for vulnerabilities
+        uses: snyk/actions/dotnet@master
+        env:
+          SNYK_TOKEN: ${{ secrets.SNYK_TOKEN }}