Dockerized the application (#119)

* dockerized the application

* Update docker.md

---------

Co-authored-by: Horilla <131998600+horilla-opensource@users.noreply.github.com>

entrypoint.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+echo "Waiting for database to be ready..."
+python3 manage.py makemigrations
+python3 manage.py migrate 
+python3 manage.py collectstatic --noinput
+python3 manage.py createhorillauser --first_name admin --last_name admin --username admin --password admin --email admin@example.com --phone 1234567890
+gunicorn --bind 0.0.0.0:8000 horilla.wsgi:application