Remove redundant commands

Dockerfile

@@ -1,23 +1,24 @@
-FROM debian:stretch
-
-MAINTAINER Paul <paul@zom.bi>, Mad <mad@zom.bi>
-
-ENV DEBIAN_FRONTEND noninteractive
-
-# Create user steam
+FROM debian:buster
 
+# Create steam user 
 RUN useradd -m -d /home/steam steam
 
 # Install dependencies (and goodies for mods)
-RUN apt-get update &&\
-    apt-get install -y curl lib32gcc1 lib32stdc++6 unzip git
-
-# Download and extract SteamCMD
-RUN mkdir -p /opt/steamcmd &&\
-    cd /opt/steamcmd &&\
-    curl -s http://media.steampowered.com/installer/steamcmd_linux.tar.gz | tar -vxz
+RUN export DEBIAN_FRONTEND=noninteractive && \
+    apt-get update && \
+    apt-get install --yes -qq --no-install-recommends \
+        curl \
+	lib32gcc1 \
+	lib32stdc++6 \
+	unzip \
+	git && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
 WORKDIR /opt/steamcmd
 
-# update steam
-RUN ./steamcmd.sh +quit
+# Download, extract and update SteamCMD
+RUN curl -s http://media.steampowered.com/installer/steamcmd_linux.tar.gz | tar -vxz && \
+    ./steamcmd.sh +quit
+
+ENTRYPOINT ["/opt/steamcmd/steamcmd.sh"]

README.md

@@ -1,10 +1,10 @@
-## steam-base
-steam-base installs the steam platform, which is required for most dedicated
-source gameserves. This image is useless on its own, but can be used to
-spin up gameservers for CS:GO, TF2 or Garys Mod.
+## steam
+steam is an image containing the steam platform, which is required for some
+dedicated gameserves. This image is not very useful on its own, but can be
+used as a base for spinning up gameservers for CS:GO, TF2 or Garys Mod.
 
-### Building steam-base
+### Building steam
 
 ```
-docker build -t zombi/steam-base .
+docker build -t zombi/steam .
 ```