Dockerfile

FROM debian:stretch

ENV HOME /home/app
ENV TMP_DIR /tmp/languagetool
RUN mkdir -p $HOME && mkdir -p $TMP_DIR

ENV DEBIAN_FRONTEND noninteractive

RUN set -ex \
    && apt-get update -y \
    && apt-get install -y --no-install-recommends openjdk-8-jre-headless unzip curl

ENV VERSION 5.2
RUN curl --max-time 300 -L https://www.languagetool.org/download/LanguageTool-$VERSION.zip -o $TMP_DIR/LanguageTool-$VERSION.zip

RUN set -ex \
    && unzip $TMP_DIR/LanguageTool-$VERSION.zip -d $TMP_DIR \
    && mv $TMP_DIR/LanguageTool-$VERSION/* $HOME/ \
    && rm -rf $TMP_DIR

RUN set -ex \
  && apt-get clean \
  && apt-get -y autoremove

COPY extra_dics $HOME/extra_dics

WORKDIR $HOME

CMD ["java", "-cp", "languagetool-server.jar", "org.languagetool.server.HTTPServer", "--port", "80", "--public", "--allow-origin", "'*'", "--config", "extra_dics/server.properties"]
EXPOSE 80