Consider adding piwheels to fix Raspberry Pi compile error

[AllanChain]

Is your feature request related to a problem? Please describe.
Yes. There are many reports of DNS package installation failure on Raspberry Pi, for example:

• SSL duckdns internal error #1955
• Dependency Build Errors for Cloudflare DNS Challenge #2070
• Docker certbot-dns-acmedns failed to install #2138

Describe the solution you'd like

The packages need compilation because no binary for ARM is found on PyPI. But we can avoid the compilation by adding piwheels.org to /etc/pip.conf:

[global]
extra-index-url=https://www.piwheels.org/simple

Maybe we can add the index conditionally based on the CPU architecture. But I'm not very familiar with docker and not sure how to do this.

Describe alternatives you've considered

As a workaround, users can create ./app/Dockerfile

FROM jc21/nginx-proxy-manager:latest

RUN echo -e "[global]\nextra-index-url=https://www.piwheels.org/simple" > /etc/pip.conf
RUN pip install certbot-dns-<your provider> --no-cache-dir

ENTRYPOINT [ "/init" ]

And change docker-compose.yml to:

    # image: 'jc21/nginx-proxy-manager:latest'
    build: ./app

Additional context

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[github-actions]

Issue was closed due to inactivity.