Progressive Web App version of ghost blog (install service worker)

Hey everyone!

So i creted app.manifest file and put it into my /var/www/ghost/content/public

I also added it routes.yml

    template: members/signup
    data: page.signup
    template: members/signin
    data: page.signin
    template: members/membership
    data: page.membership
    template: members/account
    data: page.account
  /app.manifest/ : app.manifest

But when I open my ghost blog, it returns 404. What am I doing wrong?

I want to make my blog a PWA installable from chrome app