Fix Steam login flicker with 2GB shm and stable launch scripts.

Use tini-backed entrypoint, two-phase Steam startup, and a window keeper so CEF UI and the fluxbox toolbar stay visible in Moonlight.

Co-authored-by: Cursor <cursoragent@cursor.com>

Dockerfile

@@ -13,7 +13,7 @@ RUN if [ -n "$APT_PROXY" ]; then \
 RUN dpkg --add-architecture i386 && \
     apt-get update && apt-get install -y \
     xserver-xorg-core xserver-xorg-video-dummy xserver-xorg-input-libinput \
-    fluxbox dbus-x11 xauth xfonts-base x11-xserver-utils xinput \
+    fluxbox dbus-x11 xauth xfonts-base x11-xserver-utils xinput xdotool tini \
     software-properties-common wget curl ca-certificates locales pciutils \
     libboost-chrono1.74.0 libboost-filesystem1.74.0 libboost-locale1.74.0 \
     libboost-program-options1.74.0 libboost-thread1.74.0 \
@@ -23,8 +23,7 @@ RUN dpkg --add-architecture i386 && \
     && add-apt-repository multiverse \
     && apt-get update
 
-# 2. Скачиваем оригинальный рабочий пакет Sunshine по вашей ссылке
-# ВНИМАНИЕ: Замените маркер ниже на вашу ссылку из браузера, сохранив кавычки!
+# 2. Скачиваем проверенный пакет Sunshine
 RUN wget "https://github.com/LizardByte/Sunshine/releases/download/v0.20.0/sunshine-ubuntu-22.04-amd64.deb" -O /tmp/sunshine.deb \
     && chmod +x /tmp/sunshine.deb
 
@@ -84,26 +83,10 @@ EndSubSection\n\
 EndSection\n\
 ' > /etc/X11/xorg-dummy.conf
 
-# 5. Поднимаем Xorg dummy, fluxbox и Sunshine
-RUN echo '#!/bin/bash\n\
-set -e\n\
-rm -f /tmp/.X99-lock /tmp/.X11-unix/X99\n\
-id steam >/dev/null 2>&1 || useradd -m -s /bin/bash steam\n\
-mkdir -p /home/steam/.local/share/Steam /tmp/xdg-steam\n\
-ln -sfn /home/steam/.local/share/Steam /home/steam/.steam\n\
-chown -R steam:steam /home/steam /tmp/xdg-steam\n\
-mkdir -p /run/dbus\n\
-dbus-daemon --system --fork || true\n\
-Xorg :99 -config /etc/X11/xorg-dummy.conf -nolisten tcp -noreset +extension GLX +extension RANDR +extension RENDER &\n\
-export DISPLAY=:99\n\
-export HOME=/root\n\
-export LANG=en_US.UTF-8\n\
-export LC_ALL=en_US.UTF-8\n\
-sleep 3\n\
-fluxbox &\n\
-sleep 2\n\
-exec /usr/bin/sunshine' > /entrypoint.sh && chmod +x /entrypoint.sh \
-    && chmod +x /entrypoint.sh
+# 5. Entrypoint, fluxbox и tini
+COPY scripts/entrypoint.sh /entrypoint.sh
+COPY scripts/fluxbox /etc/game-server/fluxbox
+RUN chmod +x /entrypoint.sh
 
 USER root
-ENTRYPOINT ["/entrypoint.sh"]
+ENTRYPOINT ["/usr/bin/tini", "--", "/entrypoint.sh"]