Guides:

• How to install a MQTT Broker on Raspberry Pi
• First steps with your NIG

Birdhouse:

• http://3axis.co/flexible-plywood-birdhouse-dxf-file/eo4q5687/ (Looks really good, fits really good together, needs a bit longer on the laser cutter, seems to be pretty cheap)
• https://www.instructables.com/id/Make-a-Birdhouse-Using-CNC/
• https://aribabox.com/products/bird-box (cost 6$)
• https://www.epiloglaser.com/resources/sample-club/birdhouse-laser-cutting.htm
• https://www.thingiverse.com/thing:916051 (simply, classic, needs to be test cut before)

NIG Documentation