Create Dockerfile

Dockerfile

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+# 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-20210902-slim - for the release image
+#   - https://pkgs.org/ - resource for finding needed packages
+#   - Ex: hexpm/elixir:1.13.4-erlang-24.0.1-debian-bullseye-20210902-slim
+#
+ARG ELIXIR_VERSION=1.14.2
+ARG OTP_VERSION=25.1
+ARG DEBIAN_VERSION=bullseye-20220801-slim
+
+ARG BUILDER_IMAGE="hexpm/elixir:${ELIXIR_VERSION}-erlang-${OTP_VERSION}-debian-${DEBIAN_VERSION}"
+ARG RUNNER_IMAGE="hexpm/elixir:${ELIXIR_VERSION}-erlang-${OTP_VERSION}-debian-${DEBIAN_VERSION}"
+
+FROM ${BUILDER_IMAGE} as builder
+
+# install build dependencies
+RUN apt-get update -y && apt-get install -y build-essential git curl \
+    && apt-get clean && rm -f /var/lib/apt/lists/*_*
+
+# prepare build dir
+WORKDIR /app
+
+# set build ENV
+ENV MIX_ENV="prod"
+ENV MIX_HOME="/app/.mix"
+ENV EXS_DRY_RUN="true"
+ENV MIX_INSTALL_DIR="/app/.mix"
+ENV BUMBLEBEE_CACHE_DIR="/app/.bumblebee"
+
+# install hex + rebar
+RUN mix local.hex --force && \
+    mix local.rebar --force
+
+# install mix dependencies
+COPY run.exs ./
+RUN elixir ./run.exs
+
+# start a new build stage so that the final image will only contain
+# the compiled release and other runtime necessities
+FROM ${RUNNER_IMAGE}
+
+# install build dependencies
+RUN apt-get update -y && apt-get install -y build-essential git curl \
+    && apt-get clean && rm -f /var/lib/apt/lists/*_*
+
+WORKDIR "/app"
+
+# set runner ENV
+ENV MIX_ENV="prod"
+ENV MIX_HOME="/app/.mix"
+ENV MIX_INSTALL_DIR="/app/.mix"
+ENV BUMBLEBEE_CACHE_DIR="/app/.bumblebee"
+ENV SHELL=/bin/bash
+ENV PORT=7860
+
+EXPOSE 7860
+
+# Only copy the final release from the build stage
+COPY --from=builder --chown=nobody:root /app/.mix/ ./.mix
+COPY --from=builder --chown=nobody:root /app/.bumblebee/ ./.bumblebee
+COPY --from=builder --chown=nobody:root /app/run.exs ./
+
+CMD ["elixir", "/app/run.exs"]