Com base na imagem anexada, sugiro que se alterer o path do front no back end, pois a estrutura actual do node gerada no build é ‘build/browser’ e não ‘build’.
Occord with attachment i sujest yo to change the path for frontEnd on file ‘FontendServices’ from ‘build’ to ‘build/browser’ accord the new node releases path from build.
Sorry, here’s my suggestion.
Based on the new versions of node.js, I suggest changing the frontend path mapped to the backend from ‘build’ to ‘build/browser’. In the latest versions of node.js, the build generates the code in the ‘build/browser’ folder.