Available Options:
At buildtime: ARG OS=debian:trixie-slim ARG NOVNC_VERSION=v1.6.0 ENV LANG=en_US.UTF-8
At runtime: ENV LANG=en_US.UTF-8 (inherited) ENV USER_ID=1000 GROUP_ID=1000 ENV APP=unknown ENV UMASK=0022 ENV PASSWORD="" ENV ALLOW_DIRECT_VNC=false