Create release.yml

Former-commit-id: 8983b94b84

.github/workflows/release.yml

@@ -0,0 +1,26 @@
+name: NuGet release
+on:
+  push:
+    branches:
+      - release
+  pull_request:
+    branches:
+      - release
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Prepare FFMpeg
+      run: sudo apt-get update && sudo apt-get install -y ffmpeg
+    - name: Setup .NET Core
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: 3.1.101
+    - name: Build solution -c Release
+      run: dotnet build
+    - name: Run unit tests
+      run: dotnet test
+    - name: Publish NuGet package
+      run: NUPKG=`find . -type f -name FFMpegCore*.nupkg` && dotnet nuget push $NUPKG -k ${{ secrets.NUGET_TOKEN }} -s https://api.nuget.org/v3/index.json
+