Shell Script

The Dockerfile instructs Docker to copy the shell script httpd.sh to the Docker image. Move that file from shellhttpd.disabled to the shellhttpd folder:

$ mv ../shellhttpd.disabled/httpd.sh .

Check the content of httpd.sh:

$ cat httpd.sh

#!/bin/sh -e

PORT="${PORT-8080}"
MSG="${MSG-OK}"

RESPONSE="HTTP/1.1 200 OK\r\n\r\n${MSG}\r\n"

while true; do
 echo -en "$RESPONSE" | nc -l -p "${PORT}" || true
 echo "= $(date) ============================="
done

This script responds to a request on the port defined by PORT (defaults to 8080) with the message defined by MSG (defaults to OK).