chore: تنظیم Nexus برای NuGet و Docker offline

- Dockerfile: استفاده از Nexus Docker (194.5.195.53:32082)
- NuGet.config: استفاده از Nexus NuGet با HTTP و allowInsecureConnections
- workflow: حذف kubectl dependency، اضافه کردن 32082 به insecure-registries
- csproj: تغییر push آدرس به Nexus foursat-nuget-hosted

src/BackOffice.BFF.WebApi/Dockerfile

@@ -1,10 +1,10 @@
-FROM mcr.microsoft.com/dotnet/aspnet:9.0 AS base
+FROM 194.5.195.53:32082/dotnet/aspnet:9.0 AS base
 USER $APP_UID
-WORKDIR /app
+WORKDATA /app
 EXPOSE 8080
 EXPOSE 8081
 
-FROM mcr.microsoft.com/dotnet/sdk:9.0 AS build
+FROM 194.5.195.53:32082/dotnet/sdk:9.0 AS build
 ARG BUILD_CONFIGURATION=Release
 WORKDIR /src
 COPY ["BackOffice.BFF.WebApi/NuGet.config", "NuGet.config"]