FROM node:alpine

ADD package.json /tmp
RUN cd /tmp && npm install
RUN mkdir -p /opt/app && cp -a /tmp/node_modules /opt/app/

WORKDIR /opt/app
ADD . /opt/app

RUN apk add --no-cache tzdata
ENV TZ=Europe/Berlin
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone

CMD ["npm", "start"]