I followed the instructions on the github to install node-red and the part for the openscan ui, but when i go to myip:1880/ui it just says "Please add some UI nodes to your flow and redeploy."

I want to build an open scan with an arduino on a breadboard like in the image on the arduino shield page, but I was unable to find any information about the exact components needed other than the resistor value and some markings on the pcb for the capacitors. Could anyone with an arduino shield kindly tell me the type of capacitor and optocoupler, and voltage regulator?