Update build-test.yml

.github/workflows/build-test.yml

@@ -58,3 +58,32 @@ jobs:
       run: |
         $env:DOTNET_gcServer=1
         dotnet test --no-build Content.IntegrationTests/Content.IntegrationTests.csproj -v n
+        
+  docfx:
+   runs-on: ubuntu-latest
+   steps: 
+    - uses: actions/checkout@v2
+      with:
+        submodules: true
+
+    - name: Setup .NET Core
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: 6.0.x
+        
+    - name: Install dependencies
+      run: dotnet restore
+      
+    - name: Build Project
+      run: dotnet build --no-restore /p:WarningsAsErrors=nullable
+
+    - name: Build DocFX
+      uses: nikeee/docfx-action@v1.0.0      
+      with:
+        args: Content.Docfx/docfx.json
+    
+    - name: Publish Docfx Documentation on GitHub Pages
+      uses: maxheld83/ghpages@master
+      env:
+        BUILD_DIR: Content.Docfx/_content-site 
+        GH_PAT: ${{ secrets.GH_PAT }}