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build: copy in specific folders and use Alpine #8

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merged 2 commits into from
Nov 13, 2023
Merged

build: copy in specific folders and use Alpine #8

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fe9fd14
build: copy in exact files required
boringcactus Nov 9, 2023
e77365d
build: use Alpine in Docker container
boringcactus Nov 9, 2023
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22 changes: 13 additions & 9 deletions Dockerfile
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Original file line number Diff line number Diff line change
@@ -1,17 +1,18 @@
# --- Set up Elixir build ---
FROM hexpm/elixir:1.15.7-erlang-26.1.2-debian-bullseye-20231009-slim as elixir-builder
FROM hexpm/elixir:1.15.7-erlang-26.1.2-alpine-3.18.4 as elixir-builder
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👍 Alpine described as the preferred option in this slack, and from the new application checklist if we don't expect to need bash or curl baked in.


ENV LANG=C.UTF-8 MIX_ENV=prod

RUN apt-get update --allow-releaseinfo-change
RUN apt-get install --no-install-recommends --yes \
build-essential ca-certificates git
RUN apk add --no-cache \
git
RUN mix local.hex --force
RUN mix local.rebar --force

WORKDIR /root
ADD . .
COPY ./mix.exs mix.exs
COPY ./mix.lock mix.lock
RUN mix deps.get --only prod
RUN mix deps.compile


# --- Build Elixir release ---
Expand All @@ -20,20 +21,23 @@ FROM elixir-builder as app-builder
ENV LANG=C.UTF-8 MIX_ENV=prod

WORKDIR /root
COPY ./assets assets
COPY ./config config
COPY ./lib lib
COPY ./priv priv
RUN mix compile
RUN mix assets.deploy
RUN mix phx.digest
RUN mix release


# --- Set up runtime container ---
FROM debian:bullseye-slim
FROM alpine:3.18.4

ENV LANG=C.UTF-8 MIX_ENV=prod REPLACE_OS_VARS=true

RUN apt-get update --allow-releaseinfo-change \
&& apt-get install --no-install-recommends --yes dumb-init wget \
&& rm -rf /var/lib/apt/lists/*
RUN apk add --no-cache \
dumb-init libgcc libstdc++ ncurses-libs

# Create non-root user
RUN addgroup --system mobileappbackend && adduser --system --ingroup mobileappbackend mobileappbackend
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