Update Dockerfile

Dockerfile

@@ -3,7 +3,7 @@ RUN chown root:shadow /etc/shadow; chmod 640 /etc/shadow;
 RUN [ -r /sbin/unix_chkpwd ] && chmod 2755 /sbin/unix_chkpwd || echo "/sbin/unix_chkpwd skipped"
 RUN useradd -d /home/user -s /bin/bash -m -u 1000 user
 RUN chown user -R /home/user; echo "cd ~" > /home/user/.bashrc;
-RUN --mount=type=secret,id=VNC_PASSWORD,mode=0444,required=true \
+RUN --mount=type=secret,id=VNC_PASSWORD,mode=0444,required=false \
     echo 'user:$(cat /run/secrets/VNC_PASSWORD)' | chpasswd
 RUN pwconv
 # RUN apt-add-repository "deb http://download.virtualbox.org/virtualbox/debian $(lsb_release -sc) contrib"# RUN wget -q https://www.virtualbox.org/download/oracle_vbox.asc -O- | sudo apt-key add -
@@ -33,7 +33,7 @@ RUN hostname hf-server || echo 'failed to set hostname'
 RUN git clone https://github.com/novnc/noVNC.git noVNC
 RUN mkdir -p /home/user/.vnc
 RUN chmod -R 777 /home/user/.vnc /tmp
-RUN --mount=type=secret,id=VNC_PASSWORD,mode=0444,required=true \
+RUN --mount=type=secret,id=VNC_PASSWORD,mode=0444,required=false \
     cat /run/secrets/VNC_PASSWORD | vncpasswd -f > /home/user/.vnc/passwd
 ENV HOME=/home/user \
     PATH=/home/user/.local/bin:$PATH