# Use an official lightweight image as a base
FROM alpine:latest

# Install a simple utility (e.g., curl) to run as a health check
RUN apk --no-cache add curl

# Create a dummy file that we will use in our health check
RUN touch /tmp/healthy

# Define a simple health check
HEALTHCHECK --interval=5s --timeout=3s --retries=3 \
  CMD [ ! -f /tmp/healthy ] || exit 1

# Start a basic loop that keeps the container running
CMD ["sh", "-c", "while :; do >&2 echo 'Container is running but will be unhealthy (also printing to stderr)'; sleep 30; done"]

# docker build -t unhealthy-container . -f Dockerfile.unhealthy; docker run -d --name unhealthy unhealthy-container