How to: Share folder with Docker-OSX QEMU macOS
Sharing a folder with guest is quite simple.

Your folder, will go to /mnt/hostshare inside the Arch container which is then passed over QEMU.

Then mount using `sudo -S mount_9p hostshare` from inside the mac.

For example,

```bash
FOLDER=~/somefolder
```

```bash
    -v "${FOLDER}:/mnt/hostshare" \
    -e EXTRA="-virtfs local,path=/mnt/hostshare,mount_tag=hostshare,security_model=passthrough,id=hostshare" \
```

Full example:

```bash