Update circle.yml

circle.yml

@@ -9,7 +9,8 @@ jobs:
       DOTNET_CLI_TELEMETRY_OPTOUT: 1
     steps:
       - checkout
-      - run: ./build.sh --target "Travis" --platform "AnyCPU" --configuration "Release"
+      - run: dotnet restore apps/Core2D.Avalonia.NetCore
+      - run: dotnet build apps/Core2D.Avalonia.NetCore/Core2D.Avalonia.NetCore.csproj
     notify:
       webhooks:
         - url: https://webhooks.gitter.im/e/18bc2743c91ff21c0246