add proton/vulkan deps

DEBUGGING.md

@@ -4,6 +4,13 @@ These are some commands I found useful when debugging issues with the Steam game
 
 They are pretty much unsorted and are intended for an experienced folks.
 
+Checking whether pulseaudio is working:
+
+```
+# apt -y install pulseaudio-utils
+$ paplay /usr/share/sounds/alsa/Front_Center.wav
+```
+
 ```
 apt-get update && apt-get -y install alsa-utils mesa-utils vim less gdb strace binutils wget
 ```

Dockerfile

@@ -72,6 +72,8 @@ RUN echo "enable-shm = no" >> /etc/pulse/client.conf
 RUN echo "deb http://deb.debian.org/debian jessie-backports main" | tee -a /etc/apt/sources.list
 RUN apt-get update
 RUN apt-get -y -t jessie-backports install libegl1-mesa-drivers:amd64 libegl1-mesa-drivers:i386 libgl1-mesa-dri:amd64 libgl1-mesa-dri:i386 libgl1-mesa-glx:amd64 libgl1-mesa-glx:i386 libglapi-mesa:amd64 libglapi-mesa:i386 libegl1-mesa:amd64 libegl1-mesa:i386 libgbm1:amd64 libgbm1:i386 libopenvg1-mesa:amd64 libopenvg1-mesa:i386 libwayland-egl1-mesa:amd64 libwayland-egl1-mesa:i386
+# Proton/vulkan deps
+RUN apt-get -y install python3 libvulkan1
 RUN apt-get -y autoremove
 
 # locale-gen: Generate locales based on /etc/locale.gen file
@@ -90,6 +92,9 @@ ENV GROUPS audio,video
 ENV HOME /home/$USER
 RUN useradd -m -d $HOME -u $UID -G $GROUPS $USER
 
+# DEBUGGING
+#RUN apt-get -y install alsa-utils mesa-utils vim less gdb strace binutils wget
+
 WORKDIR $HOME
 
 ENV STEAM_RUNTIME 0