feat(dockerfiles/cd): add docs PDF builder Dockerfile

dockerfiles/cd/builders/docs/Dockerfile

@@ -0,0 +1,76 @@
+# syntax=docker/dockerfile:1
+# build requires:
+#   - docker >= v23.0
+#
+# build steps:
+#   - docker build --platform=linux/amd64 --target builder -t docs-builder -f dockerfiles/cd/builders/docs/Dockerfile .
+#   - docker build --platform=linux/amd64 --target test -t docs-builder-test -f dockerfiles/cd/builders/docs/Dockerfile .
+
+########### stage: builder
+FROM --platform=linux/amd64 python:3.10-slim-bookworm AS builder
+LABEL org.opencontainers.image.authors="wuhui.zuo@pingcap.com"
+LABEL org.opencontainers.image.description="builder for PingCAP docs PDF generation"
+LABEL org.opencontainers.image.source="https://github.com/PingCAP-QE/artifacts"
+
+ENV DEBIAN_FRONTEND=noninteractive \
+    LANG=C.UTF-8 \
+    LC_ALL=C.UTF-8 \
+    PIP_NO_CACHE_DIR=1 \
+    PYTHONDONTWRITEBYTECODE=1 \
+    RCLONE_VERSION=v1.69.0
+
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
+
+RUN apt-get update \
+ && apt-get install -y --no-install-recommends \
+      bash \
+      ca-certificates \
+      curl \
+      fontconfig \
+      git \
+      jq \
+      locales \
+      openssh-client \
+      unzip \
+      xvfb \
+      pandoc \
+      texlive-xetex \
+      texlive-fonts-recommended \
+      texlive-latex-extra \
+      texlive-lang-chinese \
+      fonts-wqy-microhei \
+      fonts-wqy-zenhei \
+ && rm -rf /var/lib/apt/lists/* \
+ && ln -snf /usr/share/zoneinfo/Etc/UTC /etc/localtime \
+ && locale-gen C.UTF-8 || true
+
+RUN python -m pip install --upgrade pip setuptools wheel \
+ && python -m pip install \
+      qiniu \
+      boto3 \
+      awscli
+
+RUN curl -fsSL -o /tmp/rclone.zip \
+      "https://downloads.rclone.org/${RCLONE_VERSION}/rclone-${RCLONE_VERSION}-linux-amd64.zip" \
+ && unzip -q /tmp/rclone.zip -d /tmp \
+ && install -m 0755 \
+      "/tmp/rclone-${RCLONE_VERSION}-linux-amd64/rclone" \
+      /usr/local/bin/rclone \
+ && rm -rf /tmp/rclone.zip "/tmp/rclone-${RCLONE_VERSION}-linux-amd64"
+
+WORKDIR /work
+CMD ["/bin/sh"]
+
+########### stage: test
+FROM builder AS test
+ARG DOCS_REPO=https://github.com/pingcap/docs.git
+WORKDIR /work
+RUN git clone --depth=1 "${DOCS_REPO}" docs
+WORKDIR /work/docs
+RUN python3 scripts/merge_by_toc.py \
+ && bash scripts/generate_pdf.sh \
+ && test -s doc.md \
+ && test -s output.pdf
+
+########### stage: final
+FROM builder AS final