Magento Cloud - Redirect customer pages to home

routes.yaml

# The routes of the project.
#
# Each route describes how an incoming URL is going to be processed.

"http://{all}/":
    type: upstream
    upstream: "mymagento:http"
    redirects:
        paths:
            "^/customer/account/forgotpassword/.*": { to: "http://{all}/", regexp: true }
            "^/customer/account/login/.*": { to: "http://{all}/", regexp: true }
            "^/customer/account/logoutSuccess/.*": { to: "http://{all}/", regexp: true }
            "^/customer/account/create/.*": { to: "http://{all}/", regexp: true }
            "^/customer/account/edit/.*": { to: "http://{all}/", regexp: true }
            "^/customer/account/.*": { to: "http://{all}/", regexp: true }
            "^/customer/address/new/.*": { to: "http://{all}/", regexp: true }
            "^/customer_order/sku/.*": { to: "http://{all}/", regexp: true }
            "^/sales/order/history/.*": { to: "http://{all}/", regexp: true }
            "^/downloadable/customer/products/.*": { to: "http://{all}/", regexp: true }
            "^/wishlist/.*": { to: "http://{all}/", regexp: true }
            "^/storecredit/info/.*": { to: "http://{all}/", regexp: true }
            "^/vault/cards/listaction/.*": { to: "http://{all}/", regexp: true }
            "^/giftcard/customer/.*": { to: "http://{all}/", regexp: true }
            "^/paypal/billing_agreement/.*": { to: "http://{all}/", regexp: true }
            "^/reward/customer/info/.*": { to: "http://{all}/", regexp: true }
            "^/giftregistry/.*": { to: "http://{all}/", regexp: true }
            "^/review/customer/.*": { to: "http://{all}/", regexp: true }
            "^/newsletter/manage/.*": { to: "http://{all}/", regexp: true }
            "^/invitation/.*": { to: "http://{all}/", regexp: true }

https://{all}/:
    type: upstream
    upstream: "mymagento:https"
    redirects:
        paths:
            "^/customer/account/forgotpassword/.*": { to: "https://{all}/", regexp: true }
            "^/customer/account/login/.*": { to: "https://{all}/", regexp: true }
            "^/customer/account/logoutSuccess/.*": { to: "https://{all}/", regexp: true }
            "^/customer/account/create/.*": { to: "https://{all}/", regexp: true }
            "^/customer/account/edit/.*": { to: "https://{all}/", regexp: true }
            "^/customer/account/.*": { to: "https://{all}/", regexp: true }
            "^/customer/address/new/.*": { to: "https://{all}/", regexp: true }
            "^/customer_order/sku/.*": { to: "https://{all}/", regexp: true }
            "^/sales/order/history/.*": { to: "https://{all}/", regexp: true }
            "^/downloadable/customer/products/.*": { to: "https://{all}/", regexp: true }
            "^/wishlist/.*": { to: "https://{all}/", regexp: true }
            "^/storecredit/info/.*": { to: "https://{all}/", regexp: true }
            "^/vault/cards/listaction/.*": { to: "https://{all}/", regexp: true }
            "^/giftcard/customer/.*": { to: "https://{all}/", regexp: true }
            "^/paypal/billing_agreement/.*": { to: "https://{all}/", regexp: true }
            "^/reward/customer/info/.*": { to: "https://{all}/", regexp: true }
            "^/giftregistry/.*": { to: "https://{all}/", regexp: true }
            "^/review/customer/.*": { to: "https://{all}/", regexp: true }
            "^/newsletter/manage/.*": { to: "https://{all}/", regexp: true }
            "^/invitation/.*": { to: "https://{all}/", regexp: true }

Documentation about Magento Cloud Redirects
https://devdocs.magento.com/guides/v2.3/cloud/project/project-routes-more-redir.html

I had to use the {all} instead of {default} because it will be used with multiples domains (Differents websites)