Dockerfile

FROM ubuntu:22.04

# Set environment variables
ENV USER steam
ENV HOME /home/${USER}

# Insert Steam prompt answers
SHELL ["/bin/bash", "-o", "pipefail", "-c"]

# Create a new user with a home directory and bash shell
RUN useradd --home-dir ${HOME} --create-home --shell /bin/bash ${USER} \
    && echo steam steam/question select "I AGREE" | debconf-set-selections \
    && echo steam steam/license note '' | debconf-set-selections

# Set working directory
WORKDIR ${HOME}

# Update the repository and install SteamCMD
ARG DEBIAN_FRONTEND=noninteractive
RUN dpkg --add-architecture i386 \
    && apt-get update -y \
    && apt-get install -y --no-install-recommends ca-certificates locales steamcmd \
    && 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 symlink for executable
RUN ln -s /usr/games/steamcmd /usr/bin/steamcmd

# Update SteamCMD and verify latest version
RUN steamcmd +quit

# Fix missing directories and libraries
RUN mkdir -p ${HOME}/.steam \
    && ln -s ${HOME}/.local/share/Steam/steamcmd/linux32 ${HOME}/.steam/sdk32 \
    && ln -s ${HOME}/.local/share/Steam/steamcmd/linux64 ${HOME}/.steam/sdk64 \
    && ln -s ${HOME}/.steam/sdk32/steamclient.so ${HOME}/.steam/sdk32/steamservice.so \
    && ln -s ${HOME}/.steam/sdk64/steamclient.so ${HOME}/.steam/sdk64/steamservice.so