devcontainer: install xpra with recommends

Author: stapelberg

.devcontainer/Dockerfile

@@ -2,7 +2,7 @@ FROM mcr.microsoft.com/vscode/devcontainers/base:bookworm
 
 RUN sed -i '0,/Components: main/{s/^Components: main/Components: main contrib non-free/}' /etc/apt/sources.list.d/debian.sources
 
-RUN apt-get update && apt-get -y install --no-install-recommends vice cc65 emacs vim xpra
+RUN apt-get update && apt-get -y install --no-install-recommends vice cc65 emacs vim && apt-get -y install xpra
 
 ADD vice-setup.sh /vice-setup.sh
 RUN bash -x /vice-setup.sh