invoice-ninja: Move under pyrocufflink.net

Tabitha wants to be able to accept Apple Pay payemnts via stripe, but
this requires an additional "domain verification" step.  Apple needs to
make an HTTP request to the domain owned by the vendor, which in the
case of Invoice Ninja, must be the "app URL."  Unfortunately, there
does not appear to be a way to tell Apple/Stripe/IN to use the client
portal domain or any other domain besides the app URL.  Therefore, we
need to expose Invoice Ninja to the Internet under the public
_pyrocufflink.net_ domain, rather than the internal _pyrocufflink.blue_.

invoice-ninja/kustomization.yaml

@@ -19,7 +19,6 @@ resources:
 configMapGenerator:
 - name: invoice-ninja-init
   files:
-  - init.sh
   - start.sh
 
 - name: invoice-ninja