Cannot copy files from app directory to worker to setup cron jobs (App Platform)

Hello. I am running a Laravel app on DO App Platform. Love the service but wish cron was easier to implement. I have followed the steps in the below article, How To Setup a Job Scheduler on DigitalOcean App Platform:

https://docs.digitalocean.com/developer-center/how-to-setup-a-job-scheduler-on-digitalocean-app-platform/

I am having a hard time wrapping my mind around the worker, and how it gets access to to the main application component. My understanding is that I need to copy my Laravel app into the worker component, so that the worker can run the required php artisan schedule:work command:

https://www.digitalocean.com/community/questions/laravel-scheduled-tasks

This is the Dockerfile code I have been working with, modified from the examples linked above:

FROM ubuntu:22.04

# Install necessary packages for Laravel, including cron and unzip
RUN apt-get update \
    && DEBIAN_FRONTEND=noninteractive apt-get -y --no-install-recommends install -y cron curl unzip libpq-dev php \
    # Remove package lists for smaller image sizes
    && rm -rf /var/lib/apt/lists/* \
    && docker-php-ext-install pdo pdo_mysql \

    # Install Composer
RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer

## Set the working directory for the Laravel app
WORKDIR /workspace

# Copy the Laravel app into the container
COPY . /

# Set proper permissions for the storage and bootstrap/cache directories
RUN chown -R www-data:www-data /storage /var/www/bootstrap/cache \
    && chmod -R 755 /storage /var/www/bootstrap/cache

# Copy the crontab file and entrypoint script into the container
COPY crontab /hello-cron
COPY entrypoint.sh /entrypoint.sh

# Install the crontab and make the entrypoint script executable
RUN crontab /hello-cron \
    && chmod +x /entrypoint.sh

# Run the entrypoint script
ENTRYPOINT ["/entrypoint.sh"]

# https://manpages.ubuntu.com/manpages/trusty/man8/cron.8.html
# -f | Stay in foreground mode, don't daemonize.
# -L loglevel | Tell  cron  what to log about jobs (errors are logged regardless of this value) as the sum of the following values:
CMD ["cron", "-f", "-L", "2"]

According to the build logs the issue arises when the code tries to adjust permissions to the /storage file, and it returns a no such file/directory error. I understand the path would need to be adjusted for cache, etc. as well.

I have never used a Dockerfile before, having been fortunate enough to always have access to a simple cron setup.

I THINK my problem is coming from the working directory I specify. I am guessing the WORKDIR I specify is nonexistent and I am copying nothing and so that is why there is no file to change permissions on. When I pwd in the console for the component the app is hosted on, I see I am in the /workspace directory, and I can see all my laravel application files in there. I do not understand how I can access those files to copy the project over into the worker so that I can run the artisan schedule:work commands. I am really struggling to understand the concepts here - can any one clarify? Thank you.