Dockerfile

FROM alpine:3.4
MAINTAINER gnkm <@gnkm>

RUN set -x && \
  # enable to use wget command for donwloading from https site
  apk add --update --no-cache --virtual wget-dependencies \
    ca-certificates \
    openssl && \
  # tesseract is in testing repo
  echo 'http://dl-cdn.alpinelinux.org/alpine/edge/testing' >> /etc/apk/repositories && \
  apk add --update --no-cache tesseract-ocr && \
  # download traineddata
  # english
  wget -q -P /usr/share/tessdata/ https://github.com/tesseract-ocr/tessdata/raw/master/eng.cube.bigrams && \
  wget -q -P /usr/share/tessdata/ https://github.com/tesseract-ocr/tessdata/raw/master/eng.cube.fold && \
  wget -q -P /usr/share/tessdata/ https://github.com/tesseract-ocr/tessdata/raw/master/eng.cube.lm && \
  wget -q -P /usr/share/tessdata/ https://github.com/tesseract-ocr/tessdata/raw/master/eng.cube.nn && \
  wget -q -P /usr/share/tessdata/ https://github.com/tesseract-ocr/tessdata/raw/master/eng.cube.params && \
  wget -q -P /usr/share/tessdata/ https://github.com/tesseract-ocr/tessdata/raw/master/eng.cube.size && \
  wget -q -P /usr/share/tessdata/ https://github.com/tesseract-ocr/tessdata/raw/master/eng.cube.word-freq && \
  wget -q -P /usr/share/tessdata/ https://github.com/tesseract-ocr/tessdata/raw/master/eng.tesseract_cube.nn && \
  wget -q -P /usr/share/tessdata/ https://github.com/tesseract-ocr/tessdata/raw/master/eng.traineddata && \
  # japanese
  wget -q -P /usr/share/tessdata/ https://github.com/tesseract-ocr/tessdata/raw/master/jpn.traineddata && \
  # enable to use hocr option
  wget -q -P /usr/share/tessdata/ https://github.com/tesseract-ocr/tessdata/raw/master/osd.traineddata && \
  # delete wget-dependencies
  apk del wget-dependencies