Adding a test CI

.github/workflows/tests.yml

@@ -0,0 +1,21 @@
+name: Run unit tests
+
+on: [push, pull_request]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: 5.0.x
+    - name: Restore dependencies
+      run: dotnet restore
+    - name: Build
+      run: dotnet build --no-restore '-p:SkipWebApp=true;SkipTranscoder=true'
+    - name: Test
+      run: dotnet test --no-build