updated the build process, it now works on RPi as well.

Dockerfile

@@ -1,82 +0,0 @@
-###############################################################################
-### Front end                                                               ###
-###############################################################################
-
-FROM node:current AS frontend
-
-WORKDIR /usr/src/paperless/src-ui/
-
-COPY src-ui/package* ./
-RUN npm install
-
-COPY src-ui .
-RUN node_modules/.bin/ng build --prod --output-hashing none --sourceMap=false --output-path dist/paperless-ui
-
-###############################################################################
-### Back end                                                                ###
-###############################################################################
-
-FROM ubuntu:20.04
-
-WORKDIR /usr/src/paperless/
-
-COPY Pipfile* ./
-
-#Dependencies
-RUN apt-get update \
-  && DEBIAN_FRONTEND="noninteractive" apt-get -y --no-install-recommends install \
-		build-essential \
-		curl \
-		ghostscript \
-		gnupg \
-		imagemagick \
-		libmagic-dev \
-		libpoppler-cpp-dev \
-		libpq-dev \
-		optipng \
-		python3 \
-		python3-dev \
-		python3-pip \
-		sudo \
-		tesseract-ocr \
-		tesseract-ocr-eng \
-		tesseract-ocr-deu \
-		tesseract-ocr-fra \
-		tesseract-ocr-ita \
-		tesseract-ocr-spa \
-		tzdata \
-		unpaper \
-	&& pip3 install --upgrade pipenv supervisor setuptools \
-	&& pipenv install --system --deploy \
-	&& pipenv --clear \
-	&& apt-get -y purge build-essential python3-pip python3-dev \
-	&& apt-get -y autoremove --purge \
-	&& rm -rf /var/lib/apt/lists/* \
-	&& mkdir /var/log/supervisord /var/run/supervisord
-
-# copy scripts
-# this fixes issues with imagemagick and PDF
-COPY docker/imagemagick-policy.xml /etc/ImageMagick-6/policy.xml
-COPY docker/gunicorn.conf.py ./
-COPY docker/supervisord.conf /etc/supervisord.conf
-COPY docker/docker-entrypoint.sh /sbin/docker-entrypoint.sh
-
-# copy app
-COPY src/ ./src/
-COPY --from=frontend /usr/src/paperless/src-ui/dist/paperless-ui/ ./src/documents/static/frontend/
-
-# add users, setup scripts
-RUN addgroup --gid 1000 paperless \
-	&& useradd --uid 1000 --gid paperless --home-dir /usr/src/paperless paperless \
-	&& chown -R paperless:paperless . \
-	&& chmod 755 /sbin/docker-entrypoint.sh
-
-WORKDIR /usr/src/paperless/src/
-
-RUN sudo -HEu paperless python3 manage.py collectstatic --clear --no-input
-
-VOLUME ["/usr/src/paperless/data", "/usr/src/paperless/media", "/usr/src/paperless/consume", "/usr/src/paperless/export"]
-ENTRYPOINT ["/sbin/docker-entrypoint.sh"]
-CMD ["/usr/local/bin/supervisord", "-c", "/etc/supervisord.conf"]
-
-LABEL maintainer="Jonas Winkler <dev@jpwinkler.de>"