edge {
  label: "Edge"
  cdn { label: "CDN" }
}
origin {
  label: "Origin"
  api      { label: "API Server" }
  database { label: "Database" }
}

@layout {
  route: orthogonal
  margin: 16
  edge   { direction: vertical }
  origin { direction: vertical }
}

edge.cdn --> origin.database