Add Dockerfile based on alpine:3.9 (#354)

* Do not exclude .git from docker build

* Use multi-stage builds to keep the image size down

* Copy project files to get the test suite.

* Add webservice

* Add tesseract language data for German and Chinese Simplified

.docker/alpine.dockerfile

@@ -0,0 +1,84 @@
+FROM alpine:3.9 as base
+
+FROM base as builder
+
+ENV LANG=C.UTF-8
+
+RUN \
+  echo '@testing http://nl.alpinelinux.org/alpine/edge/testing' >> /etc/apk/repositories \
+  # Add runtime dependencies
+  && apk add --update \
+    python3-dev \
+    py3-setuptools \
+    jbig2enc@testing \
+    ghostscript \
+    qpdf \
+    tesseract-ocr \
+    unpaper \
+    pngquant \
+    libxml2-dev \
+    libxslt-dev \
+    zlib-dev \
+    qpdf-dev \
+    libffi-dev \
+    leptonica-dev \
+    binutils \
+  # Install pybind11 for pikepdf
+  && pip3 install pybind11 \
+  # Install flask for the webservice
+  && pip3 install flask \
+  # Add build dependencies
+  && apk add --virtual build-dependencies \
+    build-base \
+    git
+
+COPY . /app
+
+WORKDIR /app
+
+RUN pip3 install .
+
+FROM base
+
+ENV LANG=C.UTF-8
+
+RUN \
+  echo '@testing http://nl.alpinelinux.org/alpine/edge/testing' >> /etc/apk/repositories \
+  # Add runtime dependencies
+  && apk add --update \
+    python3 \
+    jbig2enc@testing \
+    ghostscript \
+    qpdf \
+    tesseract-ocr \
+    tesseract-ocr-data-deu \
+    tesseract-ocr-data-chi_sim \
+    unpaper \
+    pngquant \
+    libxml2 \
+    libxslt \
+    zlib \
+    qpdf \
+    libffi \
+    leptonica-dev \
+    binutils \
+  && mkdir /app
+
+WORKDIR /app
+
+# Copy build artifacts (python site-packages9
+COPY --from=builder /usr/lib/python3.6/site-packages /usr/lib/python3.6/site-packages
+COPY --from=builder /usr/bin/ocrmypdf /usr/bin/dumppdf.py /usr/bin/latin2ascii.py /usr/bin/pdf2txt.py /usr/bin/img2pdf /usr/bin/chardetect /usr/bin/
+
+# Copy
+COPY --from=builder /app/.docker/webservice.py /app/
+
+# Copy minimal project files to get the test suite.
+COPY --from=builder /app/setup.cfg /app/setup.py /app/README.md /app/
+COPY --from=builder /app/requirements /app/requirements
+COPY --from=builder /app/tests /app/tests
+COPY --from=builder /app/src /app/src
+# Copy PKG-INFO from build artifact in app dir to make setuptools-scm happy
+RUN cp /usr/lib/python3.6/site-packages/ocrmypdf-*.egg-info/PKG-INFO /app
+
+ENTRYPOINT ["/usr/bin/ocrmypdf"]

.dockerignore

@@ -5,6 +5,7 @@
 *.sublime*
 **/*.pyc
 .*/
+!.git/
 !.docker/
 .ruffus_history.sqlite
 bin/