From 4c4b4ac2e0148e728b9277042674e09788053fad Mon Sep 17 00:00:00 2001
From: Graham McIntire <graham@mcintire.me>
Date: Mon, 16 Jun 2025 15:54:36 -0500
Subject: [PATCH] docker prune

---
 Dockerfile | 90 +++++++++++++++++++-----------------------------------
 1 file changed, 31 insertions(+), 59 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 966cfaa..d7ed308 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,97 +1,69 @@
-# Find eligible builder and runner images on Docker Hub. We use Ubuntu/Debian
-# instead of Alpine to avoid DNS resolution issues in production.
-#
-# https://hub.docker.com/r/hexpm/elixir/tags?page=1&name=ubuntu
-# https://hub.docker.com/_/ubuntu?tab=tags
-#
-# This file is based on these images:
-#
-#   - https://hub.docker.com/r/hexpm/elixir/tags - for the build image
-#   - https://hub.docker.com/_/debian?tab=tags&page=1&name=bullseye-20250610-slim - for the release image
-#   - https://pkgs.org/ - resource for finding needed packages
-#   - Ex: hexpm/elixir:1.18.4-erlang-27.3.4-debian-bullseye-20250610-slim
-#
+# Build arguments
 ARG ELIXIR_VERSION=1.18.4
 ARG OTP_VERSION=27.2.4
 ARG DEBIAN_VERSION=bullseye-20250520-slim
+ARG APP_NAME=aprs
 
 ARG BUILDER_IMAGE="hexpm/elixir:${ELIXIR_VERSION}-erlang-${OTP_VERSION}-debian-${DEBIAN_VERSION}"
 ARG RUNNER_IMAGE="debian:${DEBIAN_VERSION}"
 
+# Stage 1: Build Elixir release
 FROM ${BUILDER_IMAGE} AS builder
 
-# install build dependencies
-RUN apt-get update -y && apt-get install -y build-essential git \
-    && apt-get clean && rm -f /var/lib/apt/lists/*_*
+# Install build dependencies
+RUN apt-get update -y && apt-get install -y --no-install-recommends build-essential git \
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
 
-# prepare build dir
+# Prepare build directory
 WORKDIR /app
 
-# install hex + rebar
-RUN mix local.hex --force && \
-    mix local.rebar --force
+# Install Hex and Rebar
+RUN mix local.hex --force && mix local.rebar --force
 
-# set build ENV
+# Set build environment
 ENV MIX_ENV="prod"
 
-# install mix dependencies
+# Install dependencies
 COPY mix.exs mix.lock ./
 RUN mix deps.get --only $MIX_ENV
-RUN mkdir config
-
-# copy compile-time config files before we compile dependencies
-# to ensure any relevant config change will trigger the dependencies
-# to be re-compiled.
-COPY config/config.exs config/${MIX_ENV}.exs config/
 RUN mix deps.compile
 
+# Copy application code
+COPY config config
 COPY priv priv
-
 COPY lib lib
-
 COPY assets assets
+COPY rel rel
 
-# compile assets
+# Compile assets
 RUN mix assets.deploy
 
-# Compile the release
-RUN mix compile
+# Compile and release
+RUN mix release --path /app/release
 
-# Changes to config/runtime.exs don't require recompiling the code
-COPY config/runtime.exs config/
-
-COPY rel rel
-RUN mix release
-
-# start a new build stage so that the final image will only contain
-# the compiled release and other runtime necessities
+# Stage 2: Runtime
 FROM ${RUNNER_IMAGE}
 
+# Install runtime dependencies
 RUN apt-get update -y && \
-    apt-get install -y libstdc++6 openssl libncurses5 locales ca-certificates \
-    && apt-get clean && rm -f /var/lib/apt/lists/*_*
+    apt-get install -y --no-install-recommends libstdc++6 openssl libncurses5 locales ca-certificates \
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
 
-# Set the locale
+# Set locale
 RUN sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen && locale-gen
+ENV LANG="en_US.UTF-8" LANGUAGE="en_US:en" LC_ALL="en_US.UTF-8"
 
-ENV LANG="en_US.UTF-8"
-ENV LANGUAGE="en_US:en"
-ENV LC_ALL="en_US.UTF-8"
-
+# Set working directory
 WORKDIR "/app"
 RUN chown nobody /app
 
-# set runner ENV
-ENV MIX_ENV="prod"
-
-# Only copy the final release from the build stage
-COPY --from=builder --chown=nobody:root /app/_build/${MIX_ENV}/rel/aprs ./
+# Copy release from builder
+COPY --from=builder --chown=nobody:root /app/release ./
 
+# Set user and command
 USER nobody
-
-# If using an environment that doesn't automatically reap zombie processes, it is
-# advised to add an init process such as tini via `apt-get install`
-# above and adding an entrypoint. See https://github.com/krallin/tini for details
-# ENTRYPOINT ["/tini", "--"]
-
 CMD ["/app/bin/server"]
+
+# Optional: Add healthcheck
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+    CMD curl -f http://localhost:4000/health || exit 1