app.router is deprecated, adjust according to migration doc.
app.router is deprecated, adjust according to migration doc.

mlabieniec/NodeAPI,dongguangming/NodeAPI,fritz-c/NodeAPI,MichalTuleja/jdl-backend,AlexanderMazaletskiy/NodeAPI,Simulsoft/NodeAPI,antianlu/NodeAPI,nishant8BITS/NodeAPI,ealeksandrov/NodeAPI