Install nuget

.gitea/workflows/build-debian-package.yml

@@ -20,6 +20,8 @@ jobs:
         uses: actions/setup-dotnet@v4
         with:
           dotnet-version: "10.0.x"
+      - name: "Install nuget"
+        run: apt install nuget -y
       - name: "Build .deb"
         run: ./run-build.sh "${{ gitea.ref_name }}" "./alumnihub_10.0_amd64"
       - name: "Upload .deb"