Ferment in 1 gal carboy with 1" head-space and blow-off tube.
Based on boiling 0.70 gallonsliters at 1.070 for 0 minutes, this will decrease your wort by 0.00 gallonsliters, bringing your after boil OG to 1.070. You were planning on an OG of 1.070 so you are right on track. Nice job!