grid-columns: 1
grid-gap: 0

racine: "Container root: image layers\nand write layer, frozen by --read-only" { width: 510; class: accent }
ouverts: "" {
  grid-columns: 2
  grid-gap: 0
  tmpfs: "tmpfs: writable\nin memory, emptied at stop" { width: 255 }
  volume: "Volume: writable\non disk, outlives the container" { width: 255 }
}