Using SOAP Client with Laravel Vapor

Hi, I'm building an API to be hosted with Laravel Vapor. The code works on my machine but when I deploy it to Laravel Vapor I get an error where it can't find the WSDL file.

I am using the app_path() helper to get the full path to pass into the SoapClient for the local WSDL file.

$client = new SoapClient(app_path('Services/MyService/Pull.wsdl'), $params);

Initially I was getting a timeout, so I edited the staging.Dockerfile to install php84-soap

FROM laravelphp/vapor:php84

RUN apk --update add libxml2-dev php84-soap
RUN docker-php-ext-install soap
RUN docker-php-ext-enable soap

COPY . /var/task

Then updated the runtime in my vapoy.yml to use docker

  environments:
    staging:
      runtime: docker

This fixed the timeout, but then returned this error message:

SOAP-ERROR: Parsing WSDL: Couldn't load from '/var/task/app/Services/MyService/Pull.wsdl' : failed to load "/var/task/app/Services/MyService/Pull.wsdl": No such file or directory

I am unsure if this is an environment issue or an issue with my code, but like I said, it works fine running it locally using Laravel Sail. Any help appreciated. Thanks.