Dockerfile

ARG ELIXIR_IMAGE_VERSION=1.14.0
ARG ERLANG_IMAGE_VERSION=25.0.4
ARG RELEASE_IMAGE_VERSION=3.14.6

FROM hexpm/elixir:${ELIXIR_IMAGE_VERSION}-erlang-${ERLANG_IMAGE_VERSION}-alpine-${RELEASE_IMAGE_VERSION} AS build

RUN apk update && \
  apk upgrade --no-cache && \
  apk add --no-cache \
  nodejs \
  npm \
  git \
  build-base && \
  mix local.rebar --force && \
  mix local.hex --force

RUN wget -q -O /etc/apk/keys/sgerrand.rsa.pub https://alpine-pkgs.sgerrand.com/sgerrand.rsa.pub
RUN wget https://github.com/sgerrand/alpine-pkg-glibc/releases/download/2.34-r0/glibc-2.34-r0.apk
RUN apk add glibc-2.34-r0.apk

WORKDIR /app

COPY . .

ENV MIX_ENV=prod

RUN mix do deps.get, deps.compile, compile

RUN cd assets && \
  npm ci --progress=false --no-audit --loglevel=error

ENV NODE_ENV=production

RUN mix assets.deploy

RUN mix release

#
# Release
#
FROM alpine:${RELEASE_IMAGE_VERSION} AS app

RUN apk update && \
  apk add --no-cache \
  libstdc++ \
  libgcc \
  bash \
  openssl-dev

WORKDIR /opt/app
EXPOSE 4000

RUN addgroup -g 1000 appuser && \
  adduser -u 1000 -G appuser -g appuser -s /bin/sh -D appuser && \
  chown 1000:1000 /opt/app

COPY --from=build --chown=1000:1000 /app/_build/prod/rel/crawler ./
COPY bin/start.sh ./bin/start.sh

USER appuser

CMD bin/start.sh