Dockerfile

Dockerfile

# STEP 1 - BUILD RELEASE 
# cannot use alpine 3.14.0 because of issue here with bcrypt-elxir compiling using make on docker:
# https://github.com/riverrun/bcrypt_elixir/issues/26#issuecomment-881966412
FROM hexpm/elixir:1.12.3-erlang-24.0.6-alpine-3.13.5 AS build

# install build dependencies
RUN apk add --update git \
    build-base \
    ffmpeg \
    --update npm

RUN apk add ffprobe --repository=http://dl-cdn.alpinelinux.org/alpine/edge/community

RUN npm install npm@latest -g

RUN mkdir /app
WORKDIR /app

# extend hex timeout
ENV HEX_HTTP_TIMEOUT=20

# install Hex + Rebar
RUN mix do local.hex --force, local.rebar --force

# set build ENV
ENV MIX_ENV=prod
ENV HOSTNAME=faithfulaudio.org
ENV DATABASE_URL=ecto://postgres:postgres@postgres/faithful_word
ENV SECRET_KEY_BASE=secret

# install mix dependencies
COPY mix.exs mix.lock ./
COPY config config
RUN mix deps.get --only $MIX_ENV
RUN mix deps.compile

# install npm dependencies
COPY assets/package.json assets/package-lock.json ./assets/
RUN npm --prefix ./assets install --progress=false --no-audit --loglevel=error

COPY priv priv

# build assets
COPY assets assets

# NOTE: If using TailwindCSS, it uses a special "purge" step and that requires
# the code in `lib` to see what is being used. Uncomment that here before
# running the npm deploy script if that's the case.
COPY lib lib

# RUN cd ./assets \
#     && npm install \
#     && cd ..

RUN mix assets.deploy

COPY lib lib

COPY rel rel

# build project
# COPY priv priv
# COPY lib lib
RUN mix compile

# build release
# at this point we should copy the rel directory but
# we are not using it so we can omit it
# COPY rel rel
RUN mix release

####################################################################################################
# STEP 2 - FINAL
FROM alpine:3.13.5 as app
# install runtime dependencies
# https://stackoverflow.com/questions/68010688/docker-run-error-loading-shared-library-libstdc-so-6-and-libgcc-s-so-1
RUN apk upgrade --no-cache && \ 
    apk add --update bash \
    openssl \ 
    postgresql-client \
    libstdc++

EXPOSE 4000
ENV MIX_ENV=prod
ENV DATABASE_URL=ecto://postgres:postgres@postgres/faithful_word
ENV SECRET_KEY_BASE=secret

# prepare app directory
RUN mkdir /app
WORKDIR /app

# copy build deps that cannot be installed via alpine
COPY ffprobe .

# copy release to app container
COPY --from=build /app/_build/prod/rel/faithful_word .
COPY entrypoint.sh .
RUN chown -R nobody: /app
USER nobody

ENV HOME=/app
CMD ["bash", "/app/entrypoint.sh"]