fix: build workflow

.github/workflows/dotnet-build.yml

@@ -42,9 +42,24 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-nuget-
             
-      - name: Restore
-        if: steps.cache-tests.output.cache-hit != 'true'
-        run: dotnet restore
+      - name: move nuget config
+        if: steps.cache-tests.outputs.cache-hit != 'true'
+        run: |
+          mkdir .tmp-nuget-config
+          mv NuGet.config .tmp-nuget-config
+
+      - name: build sources
+        if: steps.cache-tests.outputs.cache-hit != 'true'
+        run: |
+          for csproj in $(find src | grep csproj$)
+          do
+            dotnet build -c Release "$csproj"
+          done
+
+      - name: move nuget config back
+        run: |
+          mv .tmp-nuget-config/NuGet.config .
+          rm -rf .tmp-nuget-config
 
       - name: Build
         if: steps.cache-tests.outputs.cache-hit != 'true'