Added Dockerfile

Dockerfile

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+FROM docker.io/library/ubuntu:24.04
+
+# Avoid prompts from apt
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Agree to Steam terms prompt (used during steamcmd install)
+RUN echo steam steam/question select "I AGREE" | debconf-set-selections && \
+    echo steam steam/license note '' | debconf-set-selections
+
+# Install SteamCMD
+RUN dpkg --add-architecture i386 && \
+    apt-get update && \
+    apt-get install -y --no-install-recommends ca-certificates locales steamcmd && \
+    ln -s /usr/games/steamcmd /usr/bin/steamcmd && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+# Add unicode support
+RUN locale-gen en_US.UTF-8
+ENV LANG 'en_US.UTF-8'
+ENV LANGUAGE 'en_US:en'
+
+# Create user for SteamCMD
+RUN useradd -m steam
+
+# Switch to Steam user
+USER steam
+WORKDIR /home/steam
+
+# Install Satisfactory dedicated server
+RUN steamcmd +force_install_dir /home/steam/satisfactory_server +login anonymous +app_update 1690800 -beta public validate +quit
+
+# Expose ports:
+# - 7777/udp for game traffic
+# - 15000/udp for query traffic
+# - 15777/udp for Steam traffic
+EXPOSE 7777/udp 15000/udp 15777/udp
+
+# Persistent data volume for the server
+VOLUME ["/home/steam/.config/Epic/FactoryGame/Saved"]
+
+# Start command for the server
+CMD ["/home/steam/satisfactory_server/FactoryServer.sh"]