Dockerfile

FROM crystallang/crystal
RUN apt-get update && apt-get install -y curl

# Install Node 12.16.0
ENV NODE_VERSION 12.16.0

RUN groupadd --gid 1000 node \
  && useradd --uid 1000 --gid node --shell /bin/bash --create-home node

RUN ARCH= && dpkgArch="$(dpkg --print-architecture)" \
  && case "${dpkgArch##*-}" in \
    amd64) ARCH='x64';; \
    ppc64el) ARCH='ppc64le';; \
    s390x) ARCH='s390x';; \
    arm64) ARCH='arm64';; \
    armhf) ARCH='armv7l';; \
    i386) ARCH='x86';; \
    *) echo "unsupported architecture"; exit 1 ;; \
  esac \
  && curl -fsSLO --compressed "https://nodejs.org/dist/v$NODE_VERSION/node-v$NODE_VERSION-linux-$ARCH.tar.xz" \
  && tar -xJf "node-v$NODE_VERSION-linux-$ARCH.tar.xz" -C /usr/local --strip-components=1 --no-same-owner \
  && rm "node-v$NODE_VERSION-linux-$ARCH.tar.xz" \
  && ln -s /usr/local/bin/node /usr/local/bin/nodejs

RUN mkdir /celestite
WORKDIR /celestite

COPY package.json /celestite
RUN npm config set unsafe-perm true && npm install

COPY . /celestite
RUN crystal spec -v