FROM ubuntu:22.04

ENV DEBIAN_FRONTEND=noninteractive \
    LISTEN_PORT=7860 \
    UPSTREAM_URL=http://127.0.0.1:5000/

# Build toolchain + gettext-base (envsubst) + python3 for the demo upstream.
RUN apt-get update && apt-get install -y --no-install-recommends \
      build-essential libpcre3 libpcre3-dev zlib1g zlib1g-dev \
      libssl-dev wget curl ca-certificates gettext-base python3 procps \
    && rm -rf /var/lib/apt/lists/*

# Build nginx from source using the spec'd installer. In a container there is
# no systemd, so the unit file is written but never started; the entrypoint
# runs nginx in the foreground instead. LISTEN_PORT=7860 matches app_port.
COPY install-nginx.sh /opt/install-nginx.sh
RUN chmod +x /opt/install-nginx.sh \
    && LISTEN_PORT=7860 UPSTREAM_URL=http://127.0.0.1:5000/ /opt/install-nginx.sh

COPY demo_upstream.py /opt/demo_upstream.py
COPY docker-entrypoint.sh /opt/docker-entrypoint.sh
RUN chmod +x /opt/docker-entrypoint.sh

EXPOSE 7860

CMD ["/opt/docker-entrypoint.sh"]