Fix builder output issue with error success

        callback_type read_std_pipe = [&](const boost::system::error_code& ec, std::size_t size) {

            client_messenger.send(buffer);

            if(size > 0 && ec != asio::error::eof) {

            if(size > 0 && ec == boost::system::errc::success) {

                asio::async_read_until(std_pipe, buffer, line_matcher, read_std_pipe);

            }

            else if(size == 0 && ec == asio::error::eof) {

                logger::write("Read 0 bytes and EOF");

                logger::write("build output EOF");

            }

            else {

                logger::write(std::string("Error reading builder output: ") + ec.message());

                throw std::system_error(EBADMSG, std::generic_category(), "Error reading build output" + ec.message());

            }

        };

        // Start reading child stdout/err from pipe

class BuilderQueue {

public:

    explicit BuilderQueue(asio::io_service &io_service) : io_service(io_service) {}

    explicit BuilderQueue(asio::io_service &io_service) : io_service(io_service),

                                                          max_available_builders(1) {}

    // Create a new queue reservation and return it to the requester

    Reservation& enter();

            std::cout << line;

        } while (!line.empty());

        // Receiving file

        std::cout << "Container built!\n";

        // Read the container image

        builder_messenger.receive_file(container_path);