FROM busybox ARG buildno=1 ARG httpd_port=80 ENV httpd_port ${httpd_port} RUN mkdir -p /var/www/html/ && \ echo "ALT buildno=$buildno port=$httpd_port `date -Iseconds`" > /var/www/html/index.txt CMD httpd -f -p "$httpd_port" -h /var/www/html