Mounting docker directory failed for fuse-overlayfs.

scripts/launch_bhyve.bash

@@ -4,6 +4,10 @@ set -euo pipefail
 IFS=$'\n\t'
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
+: ${DOCKERDIR:="$DIR/docker"}
+
+mkdir -p "$DOCKERDIR"
+
 function cleanup {
     for dev in "${devices[@]}"; do
         echo "Deleting $dev"
@@ -43,6 +47,7 @@ bhyve \
     -s 4:0,virtio-blk,/vm/docker/disk0.img \
     -s 5:0,virtio-net,tap1,mac=58:9c:fc:09:c3:ba \
     -s 6:0,virtio-rnd \
+    -s "7:0,virtio-9p,docker=$DOCKERDIR" \
     -l com1,stdio \
     docker
 bhyve_status=$?