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+# ---- Build Stage ----
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+FROM erlang:21 AS app_builder
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+
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+# Set environment variables for building the application
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+ENV MIX_ENV=prod \
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+ TEST=1 \
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+ LANG=C.UTF-8
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+
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+# Fetch the latest version of Elixir (once the 1.9 docker image is available you won't have to do this)
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+RUN set -xe \
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+ && ELIXIR_DOWNLOAD_URL="https://github.com/elixir-lang/elixir/archive/v1.10.3.tar.gz" \
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+ && ELIXIR_DOWNLOAD_SHA256="f3035fc5fdade35c3592a5fa7c8ee1aadb736f565c46b74b68ed7828b3ee1897" \
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+ && curl -fSL -o elixir-src.tar.gz $ELIXIR_DOWNLOAD_URL \
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+ && echo "$ELIXIR_DOWNLOAD_SHA256 elixir-src.tar.gz" | sha256sum -c - \
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+ && mkdir -p /usr/local/src/elixir \
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+ && tar -xzC /usr/local/src/elixir --strip-components=1 -f elixir-src.tar.gz \
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+ && rm elixir-src.tar.gz \
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+ && cd /usr/local/src/elixir \
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+ && make install clean
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+
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+# Install hex and rebar
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+RUN mix local.hex --force && \
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+ mix local.rebar --force
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+
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+# Create the application build directory
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+RUN mkdir /app
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+WORKDIR /app
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+
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+# Copy over all the necessary application files and directories
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+COPY config ./config
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+COPY lib ./lib
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+COPY priv ./priv
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+COPY mix.exs .
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+COPY mix.lock .
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+
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+# Fetch the application dependencies and build the application
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+RUN mix deps.get
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+RUN mix deps.compile
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+RUN mix phx.digest
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+RUN mix release
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+
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+# ---- Application Stage ----
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+FROM debian:stretch AS app
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+
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+ENV LANG=C.UTF-8
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+
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+# Install openssl
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+RUN apt-get update && apt-get install -y openssl
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+
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+# Copy over the build artifact from the previous step and create a non root user
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+RUN useradd --create-home app
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+WORKDIR /home/app
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+COPY --from=app_builder /app/_build .
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+RUN chown -R app: ./prod
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+USER app
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+
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+# Run the Phoenix app
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+CMD ["./prod/rel/podcast_feed/bin/podcast_feed", "start"]
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