Mostly just the same as tutorial from mono

## tftp (network is required)
1. Put out/[RELEASE].img.gz and out/board.itb into your ftp server
```
setenv ipaddr 10.0.0.153
setenv serverip 10.0.0.129
tftp 0x80000000 board.itb

setenv bootargs "console=ttyS0,115200 earlycon=uart8250,mmio,0x21c0500 root=/dev/ram0 rootwait rw"
bootm 0x80000000
```

2. Inside initramfs, run
```
flash-emmc.sh
```