Docker for crystal-nodejs

Dockerfile

FROM ubuntu:20.04 as builder

ENV DEBIAN_FRONTEND=noninteractive

RUN apt-get update
RUN apt-get upgrade -y 
RUN apt-get install curl gnupg make g++ -y
RUN curl -sL "https://keybase.io/crystal/pgp_keys.asc" | apt-key add -
RUN echo "deb https://dist.crystal-lang.org/apt crystal main" | tee /etc/apt/sources.list.d/crystal.list
RUN apt-get update
RUN apt-get install crystal -y

COPY shard.* /

WORKDIR /
RUN shards install