I think that pot will be too small for it - the roots will want to grow bigger than that and you'll lose water / nutrients quickly.
Also, it looks like a plastic pot - the leaves will act like a sail and the plant pot is likely to fall over.
If you can't find out whether it's a dwarfing rootstock, you may be best restricting its eventual growth by keeping it in a bigger pot than that, but one that isn't made of plastic, and using John Innes compost number 3 rather than multi purpose (which only has enough nutrients for about 6 weeks once the plant is in active growth).