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# Stage 1: Build the application
FROM hexpm/elixir:1.18.3-erlang-25.0.4-debian-bookworm-20250317-slim AS build
# 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/*
# Set environment variables
ENV MIX_ENV=prod
# Prepare build directory
WORKDIR /app
# Install hex and rebar
RUN mix local.hex --force && \
mix local.rebar --force
# Copy configuration files first to cache dependencies
COPY mix.exs mix.lock ./
COPY config config
# Get dependencies
RUN mix deps.get --only prod
# Copy the rest of the application code
COPY lib lib
COPY priv priv
# No rel directory yet
# COPY rel rel
# Compile the application and create release
RUN mix deps.compile
RUN mix compile
RUN mix release
# Stage 2: Create the minimal runtime image
FROM debian:bookworm-slim AS app
# Install runtime dependencies
RUN apt-get update -y && \
apt-get install -y --no-install-recommends \
libstdc++6 \
openssl \
ca-certificates \
ncurses-bin \
sqlite3 \
libsqlite3-dev \
curl && \
apt-get clean && \
rm -rf /var/lib/apt/lists/*
# Set environment variables
ENV LANG=C.UTF-8 \
PHX_SERVER=true \
DB_ADAPTER=sqlite \
DATABASE_URL=sqlite3:/app/data/silmataivas.db
WORKDIR /app
# Copy the release from the build stage
COPY --from=build /app/_build/prod/rel/silmataivas ./
# Create data directory and non-root user with proper permissions
RUN mkdir -p /app/data && \
useradd -m silmataivas && \
chown -R silmataivas:silmataivas /app && \
chmod -R 750 /app/data
USER silmataivas
# Document which ports the application uses
EXPOSE 4000
# Define volumes for persistence
VOLUME ["/app/data"]
# Add health check
HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
CMD curl -f http://localhost:4000/health || exit 1
# Set the command to start the app
CMD ["/app/bin/silmataivas", "start"]
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