diff --git a/Dockerfile b/Dockerfile
index bafd2b4..eae6bd4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,36 +3,40 @@ FROM debian:stable-slim
 # Install dependencies
 RUN dpkg --add-architecture i386 && \
     apt-get update && apt-get install -y \
-        bzip2 ca-certificates curl libarchive13 libstdc++6 lib32gcc-s1 libssl1.1:i386 libstdc++6:i386 locales locales-all tmux zlib1g:i386 p7zip-full tar unzip wget xz-utils && \
+        bzip2 ca-certificates curl libarchive13 libstdc++6 lib32gcc-s1 libssl1.1:i386 \
+        libstdc++6:i386 locales locales-all tmux zlib1g:i386 p7zip-full tar unzip wget xz-utils && \
     sed -i -e 's/# en_US.UTF-8 UTF-8/en_US.UTF-8 UTF-8/' /etc/locale.gen && \
         locale-gen --no-purge en_US.UTF-8 && \
     apt-get clean && rm -rf /tmp/* /var/lib/apt/lists/* /var/tmp/*
 
-ENV LANG=en_US.UTF-8 LANGUAGE=en_US.UTF-8
+ENV LANG="en_US.UTF-8" LANGUAGE="en_US.UTF-8"
+ENV APP_DIR="/app"
+ENV STEAMCMD_DIR="${APP_DIR}/Steam/steamcmd"
+ENV SVENCOOP_DIR="${APP_DIR}/svencoop"
 ENV PUID="1000"
 ENV PGID="1000"
 
 # Set up user environment
-RUN groupadd -g $PGID abc && \
-    useradd -d /app -u $PUID -g abc abc && \
-    mkdir -p /app/svencoop && \
-    chown -R abc:abc /app
+RUN groupadd -g ${PGID} abc && \
+    useradd -d ${APP_DIR} -u ${PUID} -g abc abc && \
+    mkdir -p ${SVENCOOP_DIR} ${STEAMCMD_DIR} && \
+    chown -R abc:abc ${APP_DIR}
 
 USER abc
-WORKDIR /app
+WORKDIR ${STEAMCMD_DIR}
 
 # Download and update steamcmd
-RUN wget -qO- http://media.steampowered.com/installer/steamcmd_linux.tar.gz | tar xz -C /app && \
-    chmod +x /app/steamcmd.sh && \
-    /app/steamcmd.sh +force_install_dir /app +login anonymous +quit
+RUN wget -qO- http://media.steampowered.com/installer/steamcmd_linux.tar.gz | tar xz -C ${STEAMCMD_DIR} && \
+    chmod +x ${STEAMCMD_DIR}/steamcmd.sh && \
+    ${STEAMCMD_DIR}/steamcmd.sh +force_install_dir ${STEAMCMD_DIR} +login anonymous +quit
 
 # Download Sven Co-Op server
-RUN /app/steamcmd.sh +login anonymous +force_install_dir /app/svencoop +app_update 276060 validate +quit && \
-    echo "225840" > /app/svencoop/steam_appid.txt
+RUN ${STEAMCMD_DIR}/steamcmd.sh +login anonymous +force_install_dir ${SVENCOOP_DIR} +app_update 276060 validate +quit && \
+    echo "225840" > ${SVENCOOP_DIR}/steam_appid.txt
 
 # Link steamclient.so to prevent srcds_run errors
-RUN mkdir -p /app/.steam/sdk32 && \
-    ln -s /app/svencoop/steamclient.so /app/.steam/sdk32/steamclient.so
+RUN mkdir -p ${APP_DIR}/.steam/sdk32 && \
+    ln -s ${SVENCOOP_DIR}/steamclient.so ${APP_DIR}/.steam/sdk32/steamclient.so
 
-WORKDIR /app/svencoop
+WORKDIR ${SVENCOOP_DIR}
 ENTRYPOINT ["/app/svencoop/svends_run"]
\ No newline at end of file