# Custom arm64 PostgreSQL 16 image with PostGIS 3 + TimescaleDB 2.
# Timescale's published timescaledb-postgis image is amd64-only, so we build
# our own on Debian 12 (arm64). The app only uses standard SQL types (UUID,
# JSON, TSVECTOR, float lat/lon), so pg16 is fully sufficient.
FROM debian:12

ENV DEBIAN_FRONTEND=noninteractive

RUN apt-get update && apt-get install -y --no-install-recommends \
        ca-certificates curl gnupg lsb-release && \
    install -d /usr/share/postgresql-common/pgdg && \
    curl -fsSL -o /usr/share/postgresql-common/pgdg/apt.postgresql.org.asc \
        https://www.postgresql.org/media/keys/ACCC4CF8.asc && \
    echo "deb [signed-by=/usr/share/postgresql-common/pgdg/apt.postgresql.org.asc] \
        https://apt.postgresql.org/pub/repos/apt bookworm-pgdg main" \
        > /etc/apt/sources.list.d/pgdg.list && \
    curl -fsSL https://packagecloud.io/install/repositories/timescale/timescaledb/script.deb.sh | bash && \
    apt-get update && apt-get install -y --no-install-recommends \
        postgresql-16 postgresql-16-postgis-3 timescaledb-2-postgresql-16 && \
    # load TimescaleDB at startup
    sed -ri "s/^#?shared_preload_libraries = .*/shared_preload_libraries = 'timescaledb'/" \
        /etc/postgresql/16/main/postgresql.conf && \
    rm -rf /var/lib/apt/lists/*

# Match the official postgres image layout so volume mounts/behavior are familiar.
VOLUME ["/var/lib/postgresql/data"]
EXPOSE 5432

# Run as the postgres user (uid 999) like the official image.
USER postgres
ENV PGDATA=/var/lib/postgresql/data
ENTRYPOINT ["/usr/lib/postgresql/16/bin/postgres", "-D", "/etc/postgresql/16/main", "-c", "config_file=/etc/postgresql/16/main/postgresql.conf"]