buildx failed with: ERROR: failed to solve: process "/bin/sh -c set -x && groupadd -r unifi -g $PGID && useradd --no-log-init -r -u $PUID -g $PGID unifi && mkdir -p /usr/share/man/man1 && apt-get -qqy update && apt-get -qqy install apt-utils && apt-get -qqy --no-install-recommends install dirmngr gnupg2 > /dev/null && echo \"deb http://deb.debian.org/debian stretch main\" > /etc/apt/sources.list.d/debian-stretch.list && echo \"deb http://repo.mongodb.org/apt/debian stretch/mongodb-org/3.6 main\" > /etc/apt/sources.list.d/mongodb-org.list && apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 2930ADAE8CAF5059EE73BB4B58712A2291FA4AD5 && apt-get -qqy update && apt-get -qqy --no-install-recommends install binutils curl gosu libcap2 libcap2-bin procps > /dev/null && apt-get -qqy -t stretch --no-install-recommends install ca-certificates-java openjdk-8-jre-headless > /dev/null && apt-get -qqy --no-install-recommends install mongodb-org-server > /dev/null && curl -sSL https://dl.ui.com/unifi/${VERSION}/unifi_sysvinit_all.deb -o /tmp/unifi-${VERSION}.deb && apt-get -qqy purge apt-utils dirmngr gnupg2 > /dev/null && apt-get -qqy autoremove --purge > /dev/null && apt-get -qqy clean autoclean > /dev/null && dpkg --force-all -i /tmp/unifi-${VERSION}.deb && rm -rf data logs run && bash -c 'mkdir -p {data,logs,run,cert}' && chown -R unifi:unifi /usr/lib/unifi && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /var/log/*" did not complete successfully: exit code: 100