phx 1.6rc0

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 \
    nodejs-current \
    nodejs-npm \
    yarn

RUN mkdir /app
WORKDIR /app

# 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/goshen
ENV SECRET_KEY_BASE=secret

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

# 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/goshen
ENV SECRET_KEY_BASE=secret
# prepare app directory
RUN mkdir /app
WORKDIR /app

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

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

entrypoint.sh

# File: my_app/entrypoint.sh
#!/bin/bash
# docker entrypoint script.

# assign a default for the database_user
# DB_USER=${DATABASE_USER:-postgres}

# # wait until Postgres is ready
# while ! pg_isready -q -h $DATABASE_HOST -p 5432 -U $DB_USER
# do
#   echo "$(date) - waiting for database to start"
#   sleep 2
# done

bin="/app/bin/goshen"

if [ "$PERFORM_DB_SEED" == "true" ]
then
    eval "$bin eval \"Goshen.ReleaseTasks.seed\""
fi

# ReleaseTasks.seed does both migrate and seed
# eval "$bin eval \"FaithfulWord.ReleaseTasks.seed\""
# start the elixir application
exec "$bin" "start"

env.sh.eex

#!/bin/sh

# Sets and enables heart (recommended only in daemon mode)
# case $RELEASE_COMMAND in
#   daemon*)
#     HEART_COMMAND="$RELEASE_ROOT/bin/$RELEASE_NAME $RELEASE_COMMAND"
#     export HEART_COMMAND
#     export ELIXIR_ERL_OPTIONS="-heart"
#     ;;
#   *)
#     ;;
# esac

# Set the release to work across nodes. If using the long name format like
# the one below (my_app@127.0.0.1), you need to also uncomment the
# RELEASE_DISTRIBUTION variable below. Must be "sname", "name" or "none".
# export RELEASE_DISTRIBUTION=name
# export RELEASE_NODE=<%= @release.name %>@127.0.0.1

echo "running env.sh.eex..."

if [ "$RELEASE_COMMAND" = "start" ]; then
 echo "Beginning migration script..."
 bin/goshen eval "Goshen.ReleaseTasks.migrate()"
fi