Add Dockerfile

Dockerfile

@@ -0,0 +1,53 @@
+# after Debian 13 (trixie) is released, this can be removed in favor of the libjbig2enc-dev package
+FROM debian:bookworm-slim AS jbig2enc-builder
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential autoconf automake libtool \
+    libleptonica-dev \
+    zlib1g-dev \
+    libffi-dev \
+    ca-certificates \
+    curl \
+    git \
+    libcairo2-dev \
+    pkg-config
+
+WORKDIR /opt
+
+RUN git clone --depth 1 https://github.com/agl/jbig2enc && \
+    cd jbig2enc && \
+    ./autogen.sh && \
+    ./configure && \
+    make && \
+    make install
+
+# The actual image to be used
+FROM python:3.11-bookworm
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    libdjvulibre-dev \
+    libtiff-dev \
+    libjpeg-dev \
+    ghostscript \
+    poppler-utils \
+    libleptonica-dev \
+    # libjbig2enc-dev \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY --from=jbig2enc-builder /usr/local/lib/ /usr/local/lib/
+COPY --from=jbig2enc-builder /usr/local/bin/ /usr/local/bin/
+
+RUN pip install --no-cache-dir poetry ocrmypdf
+
+WORKDIR /app
+COPY . .
+
+RUN poetry config virtualenvs.create false \
+    && poetry install --no-interaction --no-ansi
+
+RUN mkdir /files
+
+WORKDIR /files
+
+ENTRYPOINT ["python", "-m", "dpsprep"]

README.md

@@ -95,3 +95,33 @@ http://askubuntu.com/questions/46233/converting-djvu-to-pdf (OCR text transfer)
 
 By implementing the procedure of user pyrocrasty for extracting the outline, and putting it into the PDF generated above:
 http://superuser.com/questions/801893/converting-djvu-to-pdf-and-preserving-table-of-contents-how-is-it-possible (bookmark transfer)
+
+## Using Docker
+
+Build the Docker image:
+
+```bash
+docker build -t dpsprep .
+```
+
+Run the container with a volume mount to process files:
+
+```bash
+docker run --rm -u $(id -u):$(id -g) -v $(pwd):/files dpsprep input.djvu output.pdf
+```
+
+To use specific options:
+
+```bash
+docker run --rm -u $(id -u):$(id -g) -v $(pwd):/files dpsprep --pool=8 --quality=50 input.djvu output.pdf
+```
+
+### Add as alias
+
+Put the following line into `~/.bashrc` or `~/.zshrc`:
+
+```bash
+alias dpsprep='docker run --rm -u $(id -u):$(id -g) -v $(pwd):/files dpsprep'
+```
+
+This will allow you to run the command as `dpsprep` without needing to specify the Docker command each time.