# Use the official NGINX image as a parent image
FROM nginx:alpine

# Set environment variables with default values
ENV BACKEND_HOST=git_git
ENV BACKEND_TCP_PORT=22
ENV BACKEND_UDP_PORT=22
# Set the default value of ALLOWED_IPS to cover typical Docker network ranges
# set this value to 0.0.0.0 in the Stack definition for allow all.
ENV ALLOWED_IPS="10.0.0.0/8 172.16.0.0/12 192.168.0.0/16"

# Copy the script and configuration template into the container
COPY docker-entrypoint.sh /docker-entrypoint.sh
COPY nginx.conf.template /etc/nginx/nginx.conf.template

# Make the script executable
RUN chmod +x /docker-entrypoint.sh

# HEALTHCHECK instruction using curl to check the health of the NGINX server
# Install curl, then set up the health check
RUN apk add --no-cache curl
HEALTHCHECK --interval=30s --timeout=3s --retries=3 \
  CMD curl -f http://localhost:8080/healthz || exit 1

# Use the script as the entrypoint
ENTRYPOINT ["/docker-entrypoint.sh"]