cleanup
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ARG ELIXIR_VERSION=1.18.4
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ARG OTP_VERSION=27.2.4
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ARG DEBIAN_VERSION=bullseye-20250520-slim
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# Set default non-root user and group IDs
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ARG USER_ID=1000
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ARG GROUP_ID=1000
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ARG BUILDER_IMAGE="hexpm/elixir:${ELIXIR_VERSION}-erlang-${OTP_VERSION}-debian-${DEBIAN_VERSION}"
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# Use distroless base image with glibc for Erlang/Elixir
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ARG RUNNER_IMAGE="gcr.io/distroless/base-debian11:nonroot"
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FROM ${BUILDER_IMAGE} AS builder
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# install build dependencies
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RUN apt-get update -y && \
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apt-get upgrade -y && \
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apt-get install -y build-essential git && \
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apt-get clean && \
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rm -rf /var/lib/apt/lists/*
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# prepare build dir
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WORKDIR /app
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# install hex + rebar
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RUN mix local.hex --force && \
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mix local.rebar --force
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# Install mix_gleam archive (required for Gleam compilation)
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RUN mix archive.install hex mix_gleam 0.6.2 --force
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# set build ENV
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ENV MIX_ENV="prod"
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# install mix dependencies
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COPY mix.exs mix.lock ./
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# Copy vendor directory for local dependencies
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COPY vendor vendor
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RUN mix deps.get --only $MIX_ENV
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RUN mkdir config
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# copy compile-time config files before we compile dependencies
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# to ensure any relevant config change will trigger the dependencies
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# to be re-compiled.
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COPY config/config.exs config/${MIX_ENV}.exs config/
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RUN mix deps.compile
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COPY priv priv
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COPY lib lib
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COPY assets assets
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# Copy Gleam source files and configuration
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COPY src src
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COPY gleam.toml gleam.toml
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# Ensure pre-compiled Gleam BEAM files are available
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# This helps when mix_gleam or gleam binary are not available
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RUN mkdir -p priv/gleam
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# compile assets
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RUN mix assets.deploy
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# Compile the release
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RUN mix compile
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# Changes to config/runtime.exs don't require recompiling the code
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COPY config/runtime.exs config/
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COPY rel rel
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RUN mix release
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# Create a temporary stage to prepare required libraries
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FROM debian:bullseye-slim AS lib-extractor
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# Install packages needed to extract libraries
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RUN apt-get update -y && \
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apt-get install -y --no-install-recommends \
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libstdc++6 \
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openssl \
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libncurses5 \
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libssl1.1 \
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libtinfo5 \
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libcrypto++6 \
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ca-certificates \
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&& apt-get clean && \
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rm -rf /var/lib/apt/lists/*
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# Create directories for extracted libraries
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RUN mkdir -p /tmp/distroless/lib /tmp/distroless/usr/lib /tmp/distroless/etc/ssl /tmp/distroless/usr/share
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# Copy required shared libraries
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RUN cp -a /lib/x86_64-linux-gnu/libdl.so* /tmp/distroless/lib/ && \
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cp -a /lib/x86_64-linux-gnu/librt.so* /tmp/distroless/lib/ && \
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cp -a /lib/x86_64-linux-gnu/libpthread.so* /tmp/distroless/lib/ && \
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cp -a /lib/x86_64-linux-gnu/libm.so* /tmp/distroless/lib/ && \
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cp -a /lib/x86_64-linux-gnu/libc.so* /tmp/distroless/lib/ && \
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cp -a /usr/lib/x86_64-linux-gnu/libstdc++.so* /tmp/distroless/usr/lib/ && \
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cp -a /usr/lib/x86_64-linux-gnu/libssl.so* /tmp/distroless/usr/lib/ && \
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cp -a /usr/lib/x86_64-linux-gnu/libcrypto.so* /tmp/distroless/usr/lib/ && \
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cp -a /lib/x86_64-linux-gnu/libtinfo.so* /tmp/distroless/lib/ && \
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cp -a /usr/lib/x86_64-linux-gnu/libncurses.so* /tmp/distroless/usr/lib/ && \
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cp -a /lib/x86_64-linux-gnu/libz.so* /tmp/distroless/lib/
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# Copy CA certificates
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RUN cp -a /etc/ssl/certs /tmp/distroless/etc/ssl/
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# Final distroless stage
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FROM ${RUNNER_IMAGE}
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# Set environment variables for production
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ENV MIX_ENV="prod" \
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LANG=C.UTF-8 \
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LANGUAGE=C:en \
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LC_ALL=C.UTF-8 \
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# Disable history files
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HISTFILE=/dev/null \
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# Prevent writing .erlang.cookie file to writable location
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HOME=/tmp \
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# Add security headers
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SECURITY_HEADERS="true" \
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# Configure Erlang VM for production
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ERL_AFLAGS="+S 1:1 +A 1 +K true -kernel shell_history enabled" \
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PHX_SERVER=true
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# Copy required shared libraries from lib-extractor stage
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COPY --from=lib-extractor /tmp/distroless/lib/* /lib/x86_64-linux-gnu/
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COPY --from=lib-extractor /tmp/distroless/usr/lib/* /usr/lib/x86_64-linux-gnu/
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COPY --from=lib-extractor /tmp/distroless/etc/ssl /etc/ssl
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# Set working directory
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WORKDIR /app
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# Copy the Elixir release from builder stage
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# The distroless nonroot user has UID 65532, so we use that
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COPY --from=builder --chown=65532:65532 /app/_build/prod/rel/aprsme ./
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# Create required directories with proper permissions
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USER 0
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RUN mkdir -p /tmp && \
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chmod 1777 /tmp && \
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chmod +x /app/bin/server
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USER 65532
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# Add security-related metadata
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LABEL org.opencontainers.image.vendor="APRS.me" \
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org.opencontainers.image.title="APRS.me Server (Distroless)" \
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org.opencontainers.image.description="APRS.me server with distroless base for maximum security" \
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org.opencontainers.image.version="prod" \
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security.root-user="false" \
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security.distroless="true" \
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security.privileged="false" \
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security.base-image="gcr.io/distroless/base-debian11:nonroot"
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# Distroless images use a different init system, no need for tini
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# The application should handle graceful shutdowns internally
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# Command to run the application
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ENTRYPOINT ["/app/bin/server"]
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# Container configuration is handled by Dokku
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EXPOSE $PORT
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