SteamCMD podman compatible openSUSE contianer

This is the initial work. Will add labels w/e

Signed-off-by: Pratyush Desai <pratyush.desai@liberta.casa>

Containerfile

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+# Stage 1: Build SteamCMD environment
+FROM opensuse/leap:15.6 AS builder
+
+# Install dependencies
+RUN --mount=type=cache,id=sle-pkgs,sharing=locked,target=/var/cache/zypp zypper --non-interactive update && \
+    zypper --non-interactive install \
+    bzip2 ca-certificates curl libarchive13 glibc-32bit libgcc_s1-32bit p7zip tar unzip gzip wget xz 
+
+ENV LANG=en_US.UTF-8
+ENV LANGUAGE=en_US.UTF-8
+ENV HOME=/app
+
+RUN groupadd -g 1000 steamcmd && \
+    useradd -u 1000 -g 1000 -d /app -s /bin/bash steamcmd && \
+    mkdir -p /app /output && \
+    chown 1000:1000 -R /app && \
+    chown 1000:1000 -R /output
+
+USER steamcmd
+WORKDIR /app
+
+# Download SteamCMD; run it once for self-updates
+RUN wget -qO- http://media.steampowered.com/installer/steamcmd_linux.tar.gz | tar xz -C /app && \
+    chmod +x /app/steamcmd.sh && \
+    ./steamcmd.sh +force_install_dir /output +login anonymous +quit
+
+COPY --chown=1000:1000 setuser.sh /usr/local/bin/setuser.sh
+RUN chmod +x /usr/local/bin/setuser.sh
+
+# Stage 2: Final Image
+FROM opensuse/leap:15.6
+
+# Copy SteamCMD files from builder stage
+COPY --from=builder /app /app
+COPY --from=builder /output /output
+COPY --from=builder /usr/local/bin/setuser.sh /usr/local/bin/setuser.sh
+
+RUN chmod +x /usr/local/bin/setuser.sh
+
+ENV HOME=/app
+USER steamcmd
+WORKDIR /app
+
+
+CMD ["/app/steamcmd.sh", "+quit"]

setuser.sh

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+#!/bin/bash
+# setuser.sh:  Helper script to set the user and group.
+
+if [ -z "$1" ]; then
+  echo "Usage: setuser.sh <username> <userid> <groupid>"
+  exit 1
+fi
+
+USER_NAME="$1"
+USER_ID="${2:-1000}"  # Default to 1000 if not provided
+GROUP_ID="${3:-1000}" # Default to 1000 if not provided
+
+# Check if the group exists, create if it doesn't
+if ! getent group "$USER_NAME" >/dev/null 2>&1; then
+    groupadd -g "$GROUP_ID" "$USER_NAME"
+fi
+
+# Check if the user exists, create if it doesn't
+if ! id -u "$USER_NAME" >/dev/null 2>&1; then
+    useradd -u "$USER_ID" -g "$GROUP_ID" -d /home/"$USER_NAME" -s /bin/bash "$USER_NAME"
+fi
+USER="$USER_NAME"
+# Set the user.
+exec setpriv --reuid "$USER_ID" --regid "$GROUP_ID" --init-groups -- /bin/sh -c "$0"