powerdns-admin/docs/wiki/debug/build-process.md

This discribes how to debug the buildprocess

docker-compose.yml

version: "3"
services:
  app:
    image: powerdns/custom
    container_name: powerdns
    restart: always
    build:
        context: git
        dockerfile: docker/Dockerfile
    network_mode: "host"
    logging:
      driver: json-file
      options:
        max-size: 50m
    environment:
      - BIND_ADDRESS=127.0.0.1:8082
      - SECRET_KEY='VerySecret'
      - SQLALCHEMY_DATABASE_URI=mysql://pdnsadminuser:password@127.0.0.1/powerdnsadmin
      - GUNICORN_TIMEOUT=60
      - GUNICORN_WORKERS=2
      - GUNICORN_LOGLEVEL=DEBUG
      - OFFLINE_MODE=False
      - CSRF_COOKIE_SECURE=False

Create a git folder in the location of the docker-compose.yml and clone the repo into it

mkdir git
cd git 
git clone https://github.com/PowerDNS-Admin/PowerDNS-Admin.git .

In case you are behind an SSL Filter like me, you can add the following to each stage of the git/docker/Dockerfile

This installs the command update-ca-certificates from the alpine repo and adds an ssl cert to the trust chain, make sure you are getting the right version in case the base image version changes

RUN mkdir /tmp-pkg && cd /tmp-pkg && wget http://dl-cdn.alpinelinux.org/alpine/v3.17/main/x86_64/ca-certificates-20220614-r4.apk && apk add --allow-untrusted --no-network --no-cache /tmp-pkg/ca-certificates-20220614-r4.apk || true
RUN rm -rf /tmp/pkg
COPY MyCustomCerts.crt /usr/local/share/ca-certificates/MyCustomCerts.crt
RUN update-ca-certificates
COPY pip.conf /etc/pip.conf

MyCustomCerts.crt and pip.conf have to be placed inside the git folder.

The content of pip.conf is:

[global]
cert = /usr/local/share/ca-certificates/MyCustomCerts.crt

For easier debugging you can change the CMD of the Dockerfile to CMD ["tail","-f", "/dev/null"] though I expect you to be fluent in Docker in case you wish to debug