buildx failed with: ERROR: failed to solve: process "/bin/bash -o pipefail -c apt-get update \t&& apt-get install --no-install-recommends --no-install-suggests -y gpg ca-certificates libcap2-bin libcurl4 \t&& groupadd --system --gid 101 nginx \t&& useradd --system --gid nginx --no-create-home --home-dir /nonexistent --comment \"nginx user\" --shell /bin/false --uid 101 nginx \t&& gpg --dearmor -o /usr/share/keyrings/nginx-archive-keyring.gpg /tmp/nginx_signing.key \t&& gpg --dearmor -o /usr/share/keyrings/app-protect-archive-keyring.gpg /tmp/app-protect-security-updates.key \t&& cp /tmp/nginx-plus.sources /etc/apt/sources.list.d/nginx-plus.sources \t&& apt-get update \t&& apt-get install --no-install-recommends --no-install-suggests -y nginx-plus nginx-plus-module-njs nginx-plus-module-opentracing nginx-plus-module-fips-check \t&& apt-get purge --auto-remove -y gpg \t&& cp -av /tmp/ot/usr/local/lib/libjaegertracing*so* /tmp/ot/usr/local/lib/libzipkin*so* /tmp/ot/usr/local/lib/libdd*so* /tmp/ot/usr/local/lib/libyaml*so* /usr/local/lib/ \t&& ldconfig \t&& rm -rf /var/lib/apt/lists/* /etc/apt/sources.list.d/nginx-plus.sources" did not complete successfully: exit code: 100

nginx-repo.crt= is not a valid secret