diff --git a/Dockerfile b/Dockerfile
index f760d83..cca78cf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,13 +1,13 @@
 FROM debian:trixie-slim
 
-ARG VERSION_ARG "0.0"
-ARG VERSION_VNC "1.4.0"
+ARG VERSION_ARG="0.0"
+ARG VERSION_VNC="1.4.0"
 
-ARG DEBCONF_NOWARNINGS "yes"
-ARG DEBIAN_FRONTEND "noninteractive"
-ARG DEBCONF_NONINTERACTIVE_SEEN "true"
+ARG DEBCONF_NOWARNINGS="yes"
+ARG DEBIAN_FRONTEND="noninteractive"
+ARG DEBCONF_NONINTERACTIVE_SEEN="true"
 
-RUN echo "$VERSION_ARG" > /run/version && \
+RUN set -eu && \
     apt-get update && \
     apt-get --no-install-recommends -y install \
         tini \
@@ -27,12 +27,13 @@ RUN echo "$VERSION_ARG" > /run/version && \
         qemu-efi-aarch64 && \
     apt-get clean && \
     mkdir -p /usr/share/novnc && \
-    wget https://github.com/novnc/noVNC/archive/refs/tags/v"$VERSION_VNC".tar.gz -O /tmp/novnc.tar.gz -q && \
+    wget "https://github.com/novnc/noVNC/archive/refs/tags/v${VERSION_VNC}.tar.gz" -O /tmp/novnc.tar.gz -q --timeout=10 && \
     tar -xf /tmp/novnc.tar.gz -C /tmp/ && \
-    cd /tmp/noVNC-"$VERSION_VNC" && \
+    cd "/tmp/noVNC-${VERSION_VNC}" && \
     mv app core vendor package.json *.html /usr/share/novnc && \
     unlink /etc/nginx/sites-enabled/default && \
     sed -i 's/^worker_processes.*/worker_processes 1;/' /etc/nginx/nginx.conf && \
+    echo "$VERSION_ARG" > /run/version && \
     rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
 COPY --chmod=755 ./src /run/