Mandatory GDPR webhook - advice on implementation

[Nikita92]

Dear Community, 

I'm developing an embedded app with Node.js and React (using boilerplate code generated by Shopify CLI). 

The problem is that when I want to test my GDPR webhooks implementation  by hitting Request customer data button in the test store, I don't see 'CUSTOMER DATA REQUEST' in the console, so it seems something is wrong with routing. 

Could you advice on the correct implementation, please?

Thank you!

My implementation:

1) index.js:

1) gdpr.js:

2) shopify.js:

2) App settings in Partner's dashboard: