dist/docker: Document data volume and cpuset configuration
dist/docker: Document data volume and cpuset configuration

Message-Id: <f5c2fbdd5cd815d04564320248279f636f96f46a@scylladb.com>

avikivity/scylla,scylladb/scylla,avikivity/scylla,kjniemi/scylla,scylladb/scylla,raphaelsc/scylla,raphaelsc/scylla,duarten/scylla,avikivity/scylla,scylladb/scylla,scylladb/scylla,kjniemi/scylla,duarten/scylla,kjniemi/scylla,raphaelsc/scylla,duarten/scylla