P.D. as I was reading the documentation, I didn't get clear that JBoss should be running when running the hsqldb script; could maybe mentioned in the doc?
P.D. 2: nukes/build/build/build.sh doesn't exist, the script is /nukes/build/build.sh
do a fresh checkout, I fixed that yesterday :
either : localhost:8080/nukes, localhost:8080/nukes/index.html