httpd.sh

The Dockerfile will copy the httpd.sh file to your Docker image. Move that file from shellhttpd.disabled to the shellhttpd folder:

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

Check the content of your httpd.sh:

cat httpd.sh

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 is a shell script file that will respond to a request on the port defined by the PORT environment variable (defaults to 8080) with the message defined by the MSG environment variable (defaults to OK).