buildx failed with: ERROR: failed to solve: process "/bin/sh -c apk --no-cache --update add apache2 apache2-utils curl git mysql-client msmtp php\"${PHP_VERSION}\"-common php\"${PHP_VERSION}\"-apache2 php\"${PHP_VERSION}\"-bcmath php\"${PHP_VERSION}\"-curl php\"${PHP_VERSION}\"-dom php\"${PHP_VERSION}\"-gd php\"${PHP_VERSION}\"-iconv php\"${PHP_VERSION}\"-mbstring php\"${PHP_VERSION}\"-mysqli php\"${PHP_VERSION}\"-openssl php\"${PHP_VERSION}\"-pdo_mysql php\"${PHP_VERSION}\"-phar php\"${PHP_VERSION}\"-tokenizer php\"${PHP_VERSION}\"-xml php\"${PHP_VERSION}\"-simplexml php\"${PHP_VERSION}\"-xmlwriter php\"${PHP_VERSION}\"-zip php\"${PHP_VERSION}\"-ctype php\"${PHP_VERSION}\"-session php\"${PHP_VERSION}\"-fileinfo php\"${PHP_VERSION}\"-soap && mkdir -p /var/www/oxideshop/source && chown -R apache:apache /var/www/ && ln -sf /usr/bin/php\"${PHP_VERSION}\" /usr/bin/php && if [ ${PHP_VERSION} = 7 ]; then apk --no-cache --update add php\"${PHP_VERSION}\"-json; fi" did not complete successfully: exit code: 21