Fix Docker setup - download GMod at runtime

- Dockerfile now only installs SteamCMD, server downloaded on first run
- Entrypoint handles full server installation including addons
- Fixed volume configuration for persistence
- Added AUTO_UPDATE environment variable

docker/Dockerfile

@@ -1,6 +1,8 @@
 #===============================================================================
 # Garry's Mod PropHunt Server - Docker Image
 # Repository: https://git.vish.gg/Vish/gmod-prophunt-server
+#
+# This Dockerfile downloads GMod server at runtime for better compatibility
 #===============================================================================
 
 FROM debian:bookworm-slim
@@ -23,7 +25,8 @@ ENV DEBIAN_FRONTEND=noninteractive \
     GAMEMODE="prop_hunt" \
     WORKSHOP_COLLECTION="" \
     TICKRATE="66" \
-    TZ="America/Los_Angeles"
+    TZ="America/Los_Angeles" \
+    AUTO_UPDATE="true"
 
 # Install dependencies
 RUN dpkg --add-architecture i386 && \
@@ -36,7 +39,6 @@ RUN dpkg --add-architecture i386 && \
         unzip \
         lib32gcc-s1 \
         lib32stdc++6 \
-        libsdl2-2.0-0:i386 \
         locales \
         tzdata && \
     sed -i -e 's/# en_US.UTF-8 UTF-8/en_US.UTF-8 UTF-8/' /etc/locale.gen && \
@@ -50,70 +52,32 @@ ENV LANG=en_US.UTF-8 \
 
 # Create user and directories
 RUN useradd -m -s /bin/bash gmod && \
-    mkdir -p ${SERVER_DIR} ${STEAMCMD_DIR} && \
+    mkdir -p /home/gmod/serverfiles /home/gmod/steamcmd && \
     chown -R gmod:gmod /home/gmod
 
 # Switch to gmod user
 USER gmod
 WORKDIR /home/gmod
 
-# Install SteamCMD
-RUN cd ${STEAMCMD_DIR} && \
-    curl -sqL "https://steamcdn-a.akamaihd.net/client/installer/steamcmd_linux.tar.gz" | tar zxvf -
+# Install SteamCMD only (server downloaded at runtime)
+RUN cd /home/gmod/steamcmd && \
+    curl -sqL "https://steamcdn-a.akamaihd.net/client/installer/steamcmd_linux.tar.gz" | tar zxvf - && \
+    ./steamcmd.sh +quit
 
-# Install Garry's Mod server
-RUN cd ${STEAMCMD_DIR} && \
-    ./steamcmd.sh +force_install_dir ${SERVER_DIR} \
-        +login anonymous \
-        +app_update 4020 validate \
-        +quit
-
-# Install MetaMod:Source
-RUN cd /tmp && \
-    METAMOD_VER=$(curl -s "https://mms.alliedmods.net/mmsdrop/1.11/" | grep -oP 'mmsource-[\d.]+-git\d+-linux\.tar\.gz' | tail -1) && \
-    wget -q "https://mms.alliedmods.net/mmsdrop/1.11/${METAMOD_VER}" -O metamod.tar.gz && \
-    tar -xzf metamod.tar.gz -C ${SERVER_DIR}/garrysmod/ && \
-    rm metamod.tar.gz
-
-# Install SourceMod
-RUN cd /tmp && \
-    SOURCEMOD_VER=$(curl -s "https://sm.alliedmods.net/smdrop/1.11/" | grep -oP 'sourcemod-[\d.]+-git\d+-linux\.tar\.gz' | tail -1) && \
-    wget -q "https://sm.alliedmods.net/smdrop/1.11/${SOURCEMOD_VER}" -O sourcemod.tar.gz && \
-    tar -xzf sourcemod.tar.gz -C ${SERVER_DIR}/garrysmod/ && \
-    rm sourcemod.tar.gz
-
-# Install ULib and ULX
-RUN cd /tmp && \
-    wget -q "https://github.com/TeamUlysses/ulib/archive/refs/heads/master.zip" -O ulib.zip && \
-    unzip -q ulib.zip -d ${SERVER_DIR}/garrysmod/addons/ && \
-    mv ${SERVER_DIR}/garrysmod/addons/ulib-master ${SERVER_DIR}/garrysmod/addons/ulib && \
-    rm ulib.zip && \
-    wget -q "https://github.com/TeamUlysses/ulx/archive/refs/heads/master.zip" -O ulx.zip && \
-    unzip -q ulx.zip -d ${SERVER_DIR}/garrysmod/addons/ && \
-    mv ${SERVER_DIR}/garrysmod/addons/ulx-master ${SERVER_DIR}/garrysmod/addons/ulx && \
-    rm ulx.zip
-
-# Copy configuration files
-COPY --chown=gmod:gmod cfg/ ${SERVER_DIR}/garrysmod/cfg/
+# Copy configuration and entrypoint
+COPY --chown=gmod:gmod cfg/ /home/gmod/cfg-template/
 COPY --chown=gmod:gmod scripts/docker-entrypoint.sh /home/gmod/entrypoint.sh
 
-# Make scripts executable
 USER root
-RUN chmod +x /home/gmod/entrypoint.sh ${SERVER_DIR}/srcds_run ${SERVER_DIR}/srcds_linux 2>/dev/null || true
+RUN chmod +x /home/gmod/entrypoint.sh
 USER gmod
 
 # Expose ports
 EXPOSE 27015/tcp 27015/udp 27005/udp 27020/udp
 
 # Volumes for persistent data
-VOLUME ["/home/gmod/serverfiles/garrysmod/data", \
-        "/home/gmod/serverfiles/garrysmod/cfg", \
-        "/home/gmod/serverfiles/garrysmod/addons"]
+VOLUME ["/home/gmod/serverfiles"]
 
-# Health check
-HEALTHCHECK --interval=30s --timeout=10s --start-period=120s --retries=3 \
-    CMD curl -f http://localhost:27015/ 2>/dev/null || exit 1
-
-WORKDIR ${SERVER_DIR}
+WORKDIR /home/gmod
 
 ENTRYPOINT ["/home/gmod/entrypoint.sh"]