Broken getty in init

linuxkit.yml

kernel:
  image: "linuxkit/kernel:4.9.x"
  cmdline: "console=ttyS0 page_poison=1"
init:
  - linuxkit/init:2599bcd5013ce5962aa155ee8929c26160de13bd
  - linuxkit/runc:3a4e6cbf15470f62501b019b55e1caac5ee7689f
  - linuxkit/containerd:b50181bc6e0084e5fcd6b6ad3cf433c4f66cae5a
  - linuxkit/ca-certificates:75cf419fb58770884c3464eb687ec8dfc704169d
  - linuxkit/getty:ef9d667af71089326419fb08e9cc9d567cf15748
onboot:
  - name: sysctl
    image: "linuxkit/sysctl:3aa6bc663c2849ef239be7d941d3eaf3e6fcc018"
  - name: binfmt
    image: "linuxkit/binfmt:8ac5535f57f0c6f5fe88317b9d22a7677093c765"
  - name: dhcpcd
    image: "linuxkit/dhcpcd:7d2b8aaaf20c24ad7d11a5ea2ea5b4a80dc966f1"
    command: ["/sbin/dhcpcd", "--nobackground", "-f", "/dhcpcd.conf", "-1"]
services:
  - name: rngd
    image: "linuxkit/rngd:1fa4de44c961bb5075647181891a3e7e7ba51c31"
  - name: nginx
    image: "nginx:alpine"
    capabilities:
     - CAP_NET_BIND_SERVICE
     - CAP_CHOWN
     - CAP_SETUID
     - CAP_SETGID
     - CAP_DAC_OVERRIDE
files:
  - path: etc/containerd/config.toml
    contents: |
      state = "/run/containerd"
      root = "/var/lib/containerd"
      snapshotter = "overlay"
      subreaper = false

      [grpc]
      address = "/run/containerd/containerd.sock"
      uid = 0
      gid = 0

      [debug]
      address = "/run/containerd/debug.sock"
      level = "info"

      [metrics]
      address = ":13337"
trust:
  org:
    - linuxkit
  image:
    - nginx:alpine