---> Using cache ---> 212d2c0b0bbfStep 8/9 : RUN rvm install 2.6.6 && rvm alias create 2.6 ruby-2.6.6 && rvm use --default 2.6.6 ---> Running in 4aa5be1b1f97/bin/sh: rvm: command not foundThe command '/bin/sh -c rvm install 2.6.6 && rvm alias create 2.6 ruby-2.6.6 && rvm use --default 2.6.6' returned a non-zero code: 127Running after_scriptUploading artifacts for failed jobERROR: Job failed: exit code 127