Add generic node.sh to run node apps as root and with memory limitations

src/scripts/node.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+set -eu -o pipefail
+
+if [[ ${EUID} -ne 0 ]]; then
+    echo "This script should be run as root." > /dev/stderr
+    exit 1
+fi
+
+if [[ $# -eq 0 ]]; then
+    echo "No arguments supplied"
+    exit 1
+fi
+
+if [[ "$1" == "--check" ]]; then
+    echo "OK"
+    exit 0
+fi
+
+echo "Running node with memory constraints"
+
+/usr/bin/node --max_old_space_size=150 "$@"