FROM node:15.14.0-alpine3.12

ENV REVEAL_JS_VERSION=4.1.0

RUN set -ex \
  && apk add --no-cache \
    g++ \
    make \
    python2 \
    unzip \
    wget

RUN set -ex \
  && wget https://github.com/hakimel/reveal.js/archive/refs/tags/${REVEAL_JS_VERSION}.zip \
  && unzip ${REVEAL_JS_VERSION}.zip

WORKDIR "/reveal.js-${REVEAL_JS_VERSION}"

RUN set -ex \
  && npm i

ENTRYPOINT npm start