Usage 1

./cmd.sh start

# Now can visit http://localhost:8000

./cmd.sh redirect

./cmd.sh stop

Usage 2

cp -r for-systemd /opt/wait-then-redirect
mv /opt/wait-then-redirect/wait-then-redirect.service /usr/lib/systemd/system/

systemctl start wait-then-redirect
curl http://localhost:8000
systemctl stop wait-then-redirect