Make the board longer (18mm instead of 14mm)

node_board/main.cpp

@@ -96,7 +96,7 @@ int main() {
 
     // board params
     // width is deduced later
-    double const height = 14;
+    double const height = 18;
     double const ppmm = 50; // equivalent to 1270 ppi
     double const min_cut_thickness = 0.38;
     double const min_trace_thickness = 0.35;