fix deploy config

backend/Dockerfile

@@ -7,9 +7,11 @@ COPY ClientApp/ .
 RUN npm run build
 
 # Stage 2: Build the backend
-FROM mcr.microsoft.com/dotnet/sdk:8.0 AS backend-build
+FROM mcr.microsoft.com/dotnet/sdk:9.0 AS backend-build
 WORKDIR /src
-COPY ["backend.csproj", "."]
+COPY nuget.config ./
+COPY backend.csproj ./
+RUN dotnet nuget list source
 RUN dotnet restore
 COPY . .
 # Copy the frontend build output from the previous stage
@@ -17,7 +19,7 @@ COPY --from=frontend-build /app/dist ./ClientApp/dist
 RUN dotnet publish -c Release -o /app/publish
 
 # Stage 3: Runtime
-FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS runtime
+FROM mcr.microsoft.com/dotnet/aspnet:9.0 AS runtime
 WORKDIR /app
 EXPOSE 8080
 ENV ASPNETCORE_URLS=http://+:8080