Add CI workflow for building the web app with .NET Core

Author: CalinL

.github/workflows/ci.yml

@@ -0,0 +1,39 @@
+name: CI
+
+on:
+  pull_request:
+    branches:
+      - main
+
+permissions:
+    id-token: write
+    contents: read
+
+env:
+  SRC_PROJECT_PATH: '/webapp01/webapp01.csproj' 
+  AZURE_WEBAPP_PACKAGE_PATH: './src'            # set this to the path to your web app project, defaults to the repository root
+  DOTNET_VERSION: '9.0.x'                       # set this to the dot net version to use
+
+jobs:
+  ci_build:
+    name: Build Web App
+    
+    runs-on: ubuntu-latest
+
+    steps:
+      # Checkout the repo
+      - uses: actions/checkout@main
+      
+      # Setup .NET Core SDK
+      - name: Setup .NET Core
+        uses: actions/setup-dotnet@v3
+        with:
+          dotnet-version: ${{ env.DOTNET_VERSION }} 
+      
+      # Run dotnet build
+      - name: dotnet build
+        run: |
+          dotnet restore ${{ env.AZURE_WEBAPP_PACKAGE_PATH }}${{ env.SRC_PROJECT_PATH }}
+          dotnet build --configuration Release ${{ env.AZURE_WEBAPP_PACKAGE_PATH }}${{ env.SRC_PROJECT_PATH }}
+      
+