Nextcloud - docker - fpm-alpine dockerfile add tesseract-ocr and fix svg support and default_phone_region

Dockerfile

# add tesseract
# add php-imagick
# add py-pluggy, a not documented, dependency for ocrmypdf
#
# by default english is installed as an ocr language for tesseract on alpine
# adds tesseract-ocr-data-deu, change to your local language or remove
#
# This `pecl install imagick || true` is a workaround as imagick was installed
# on some image verions but pecl fails if already installed
#
# /usr/src/nextcloud/config/ is the directory from which the settings are
# rsynced to the new volume, on first start of the container.
# every .config.php file is loaded in succession and the $CONFIG array is merged
#
ARG IMAGE_VERSION
FROM nextcloud:${IMAGE_VERSION}-fpm-alpine
ARG DEFAULT_PHONE_REGION US

RUN echo "Version: ${IMAGE_VERSION}, Region: ${DEFAULT_PHONE_REGION}"

RUN apk update \
    && apk add --no-cache wget \
    && apk add --no-cache --update tesseract-ocr \
    && apk add --no-cache tesseract-ocr-data-deu \
    && apk add --no-cache ocrmypdf \
    && apk add --no-cache py3-pip

RUN set -ex \
    && apk add --no-cache --virtual .phpize-deps $PHPIZE_DEPS imagemagick-dev libtool \
    && export CFLAGS="$PHP_CFLAGS" CPPFLAGS="$PHP_CPPFLAGS" LDFLAGS="$PHP_LDFLAGS" \
    && pecl install imagick || true \
    && docker-php-ext-enable imagick \
    && apk add --no-cache --virtual .imagick-runtime-deps imagemagick \
    && apk del .phpize-deps

RUN apk add --no-cache py3-pluggy

RUN printf "<?php\n\
\$CONFIG = [                         \n\
'default_phone_region' => '${DEFAULT_PHONE_REGION}',    \n\
]; \n\
" >> /usr/src/nextcloud/config/default_phone_region.config.php

docker-compose.yml

services:
  app:
    build:
      context: .
      dockerfile: Dockerfile
      args:
        IMAGE_VERSION: 23
        DEFAULT_PHONE_REGION: US

pip install pluggy throws error: externally-managed-environment

replaced with apk add --no-cache py3-pluggy

Thanks @znedw, distribution got smarter about handling their dependencies and so did python, I am glad it does work at all.