Originally Posted by Jipe

Yes, it will probably be too close to the frame.

No, you cannot add spacers because the axle of the crankset won't be long enough. This relatively narrow chainline is a standard for road bikes.

The chainline isn't defined by the chainrings but by the crankset, so, yes with the original crankset, it should work with these Litepro chainrings. Personally, I do not like Litepro cheap components, I would choose Stronglite but they are more expensive.

To mount two chanrings, you will also need longer chainring bolts since the one on the Birdy are mrant for a single chainring.