How to build more ships?

I must just be missing it, but how do I build more than five capital ships?  I play on these maps, capture a lot of control points, but can never build more than five capital ships.  I noticed when I do the tutorial it starts with six capital ship slots.  However, the two campaign maps I've played have always been 0/5 slots for capital ships.  I'm not sure what I'm doing wrong.

Along similar lines, can you increase the number of hanger slots available?  The number of slots available to build defense stations around control points?

Thanks in advance for any help.

Aside from that, by the way, the game is great!  Nice job sending out an email and getting us all the buy it on day 1.  I hope it's doing well.