Fix Unicode character error building Japanese PDF documents

[atsuoishimoto]

Fix Unicode character error building Japanese PDF documents.

See python/python-docs-ja#31, python/python-docs-ja#35

• Use LuaTex instead of pLatex.
• Use ltjsbook and ltjsarticle as document class.
• Temporarily replace U+FFFD with '?' until updated luatex is released (https://github.com/TeX-Live/luatex/commit/eaa95ce0a141eaf7a02).

[atsuoishimoto]

Dockerfile I used to build the document:

FROM ubuntu:22.04

ENV DEBIAN_FRONTEND=noninteractive

WORKDIR /pydoc
RUN apt update \
    && apt-get install -y python3.11 python3-pip python3.11-venv git rsync zip \
    curl latexmk xindy texinfo texlive-xetex texlive-latex-recommended \
    texlive-fonts-extra texlive-lang-japanese fonts-noto-cjk-extra\
    texlive-luatex \
    && apt-get clean
RUN python3.11 -m venv .venv

ENV PATH="/pydoc/.venv/bin:${PATH}"
COPY requirements.txt .
RUN pip install -r requirements.txt
WORKDIR /builddir

[JulienPalard]

Tried it locally: it works, let's try it in production!

[JulienPalard]

(Thanks for all the hard work on this!)