content: FROM alpine
  
  RUN apk add --no-cache curl
  RUN apk add --no-cache --upgrade bash
  
  COPY availability.sh /usr/local/bin/availability.sh
  
  RUN chmod +x /usr/local/bin/availability.sh
  
  CMD ["sh", "-c", "while true; do /usr/local/bin/availability.sh; sleep 5; done"]
  