Node script executable not working on Mac : env: node\r: No such file or directory

After all, I found the solution to my problem.

As my node script file has been created on Windows, the file is DOS format (line endings in DOS format I think). So, I used a module which allow to converting a file to a unix format :

brew install dos2unix
sudo dos2unix /usr/local/lib/node_modules/task-app/src/task-app.js