Why is my site not building?

I need advice to debug deploy https://app.netlify.com/sites/nervous-hawking-543f3b/deploys/5e1b30865947adc10edd1afc

Hello @HelHelHelHel, it looks like your build is failing due to your gulpfile.js not have a build script:

8:43:51 AM: Task never defined: build

You’ll need to fix that in order for our buildbot to know what commands to run.