Minor edit

Dockerfile

@@ -26,7 +26,7 @@ RUN apt-get clean && apt-get update && apt-get dist-upgrade -y && apt-get instal
         tzdata && \
     apt-get clean && rm -rf /var/lib/apt/lists/* /var/cache/debconf/* /var/log/* /tmp/* /var/tmp/* && \
     locale-gen en_US.UTF-8 && \
-    ln -snf "/usr/share/zoneinfo/$TZ" /etc/localtime && echo "$TZ" > /etc/timezone && \
+    ln -snf "/usr/share/zoneinfo/${TZ}" /etc/localtime && echo "${TZ}" > /etc/timezone && \
     # Only use sudo-root for root-owned directory (/dev, /proc, /sys) or user/group permission operations, not for apt-get installation or file/directory operations
     mv -f /usr/bin/sudo /usr/bin/sudo-root && \
     ln -snf /usr/bin/fakeroot /usr/bin/sudo && \

entrypoint.sh

@@ -13,11 +13,11 @@ until [ -d "${XDG_RUNTIME_DIR}" ]; do sleep 0.5; done
 # Make user directory owned by the default ubuntu user
 chown -f ubuntu:ubuntu ~ || sudo-root chown -f ubuntu:ubuntu ~ || chown -R -f -h --no-preserve-root ubuntu:ubuntu ~ || sudo-root chown -R -f -h --no-preserve-root ubuntu:ubuntu ~ || echo 'Failed to change user directory permissions, there may be permission issues'
 # Change operating system password to environment variable
-(echo "$PASSWD"; echo "$PASSWD";) | sudo passwd ubuntu || (echo "mypasswd"; echo "$PASSWD"; echo "$PASSWD";) | passwd ubuntu || echo 'Password change failed, using default password'
+(echo "${PASSWD}"; echo "${PASSWD}";) | sudo passwd ubuntu || (echo "mypasswd"; echo "${PASSWD}"; echo "${PASSWD}";) | passwd ubuntu || echo 'Password change failed, using default password'
 # Remove directories to make sure the desktop environment starts
 rm -rf /tmp/.X* ~/.cache || echo 'Failed to clean X11 paths'
 # Change time zone from environment variable
-ln -snf "/usr/share/zoneinfo/$TZ" /etc/localtime && echo "$TZ" | tee /etc/timezone > /dev/null || echo 'Failed to set timezone'
+ln -snf "/usr/share/zoneinfo/${TZ}" /etc/localtime && echo "${TZ}" | tee /etc/timezone > /dev/null || echo 'Failed to set timezone'
 # Add Lutris directories to path
 export PATH="${PATH:+${PATH}:}/usr/local/games:/usr/games"
 # Add LibreOffice to library path