how to create zip file for libreelec 8

  • Hello everyone
    First of all sorry for my bad english. I like the whole idea of libreelec project and i have installed it on my android box. I have played with different libreelec versions but only LibreELEC-S805.m201d.arm-7.0.3.3c.zip went smoothly. Now i would like to try libreelec 8 but there is no zip file. Could you please point me out on how to create zip file from img . Also what's the difference of *.img and *.zip libreelec version. I have forgot to mention that my box has 512mb ram and it doesn't have sd card slot ( i have installed it in nand ).

    BR