If it's interesting to anyone, I evaluated a few NAS software and landed on Unraid, which is not as popular, but quite nice. It's not free (but it's cheap), but

If it's interesting to anyone, I evaluated a few NAS software and landed on Unraid, which is not as popular, but quite nice. It's not free (but it's cheap), but the way I can easily expand storage and Docker support sealed the deal for me.