Example scenario: 1[root@selenium php-5.1.2]# docker build -t php5_1_2 . 2Sending build context to Docker daemon 8.071MB 3Step 1/9 : FROM nubs/arch-build 4---> a68cd3855bfe 5Step 2/9 : MAINTAINER Spencer Rinehart <anubis@overthemonkey.com> 6---> Using cache 7---> 0d099a2cd179 8Step 3/9 : COPY …