Adding GH Action for CI build (#1)

Added initial CI build GitHub Action

Author: smaillet

Diff for: .github/workflows/ci-build.yml

@@ -0,0 +1,19 @@
+name: CI Build
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: windows-latest
+
+    steps:
+    - name: Check Out
+      uses: actions/checkout@v1
+      
+    - name: Setup .NET Core
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: 2.2.108
+    
+    - name: Build with dotnet
+      run: dotnet build --configuration Release