142 lines
3.9 KiB
Docker
142 lines
3.9 KiB
Docker
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-${DEBIAN_VERSION}"
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ARG RUNNER_IMAGE="debian:${DEBIAN_VERSION}"
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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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# 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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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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# 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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# start a new build stage so that the final image will only contain
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# the compiled release and other runtime necessities
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FROM ${RUNNER_IMAGE}
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# Install security updates and required packages
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ENV DEBIAN_FRONTEND=noninteractive
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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 --no-install-recommends \
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libstdc++6 \
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openssl \
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libncurses5 \
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locales \
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ca-certificates \
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tini && \
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apt-get clean && \
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rm -rf /var/lib/apt/lists/* && \
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# Create a non-root user and group with specific ID
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groupadd -g 1000 aprs && \
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useradd -r -g aprs -u 1000 -s /bin/false -M aprs && \
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# Remove setuid and setgid permissions
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find / -perm /6000 -type f -exec chmod a-s {} \; || true && \
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# Secure system configurations
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chmod 0600 /etc/login.defs && \
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chmod 0600 /etc/passwd && \
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chmod 0600 /etc/group && \
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# Create and secure app directory
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mkdir -p /app && \
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chown aprs:aprs /app && \
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chmod 0750 /app
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# Set the locale
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RUN sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen && locale-gen
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ENV LANG en_US.UTF-8
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ENV LANGUAGE en_US:en
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ENV LC_ALL en_US.UTF-8
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WORKDIR "/app"
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# Set security-related environment variables
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ENV MIX_ENV="prod" \
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LANG=en_US.UTF-8 \
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LANGUAGE=en_US:en \
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LC_ALL=en_US.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
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HOME=/dev/null \
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# Add security headers
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SECURITY_HEADERS="true" \
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# Disable debug info in production
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ERL_AFLAGS="+S 1:1 +A 1 +K true -kernel shell_history enabled -kernel shell_history_file_bytes 0" \
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PHX_SERVER=true
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# Only copy the final release from the build stage
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COPY --from=builder --chown=1000:1000 /app/_build/${MIX_ENV}/rel/aprs ./
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USER 1000
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# Ensure the server binary is executable
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RUN chmod +x /app/bin/server
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# If using an environment that doesn't automatically reap zombie processes, it is
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# advised to add an init process such as tini via `apt-get install`
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# above and adding an entrypoint. See https://github.com/krallin/tini for details
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# ENTRYPOINT ["/tini", "--"]
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# Add specific capabilities needed by the app
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CMD /app/bin/server
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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" \
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org.opencontainers.image.description="APRS.me server with security hardening" \
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org.opencontainers.image.version="${MIX_ENV}" \
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org.opencontainers.image.created="$(date -u +'%Y-%m-%dT%H:%M:%SZ')" \
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security.root-user="false" \
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security.non-root-user="app" \
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security.privileged="false"
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# Container configuration is handled by Dokku
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EXPOSE $PORT
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