Add example of a failing job

fail

+#! /bin/bash
+#SBATCH -o ./log.out
+#SBATCH -e ./log.err
+#SBATCH -D ./
+#SBATCH -J example_script
+#SBATCH --nodes=1
+#SBATCH --tasks-per-node=40
+#SBATCH --cpus-per-task=1
+#SBATCH --mail-type=none
+#SBATCH --time=00:30:00
+
+set -e
+
+echo "I am a failing job"
+exit 1