Add ps requirement, missing from Docker container!

run.sh

@@ -91,6 +91,10 @@ if [[ ! `which curl` ]]; then
 	echo "- Installing Curl"
 	$sudo apt-get install -y curl
 fi
+if [[ ! `which ps` ]]; then
+	echo "- Installing PS"
+	$sudo apt-get install -y ps
+fi
 
 # Directories and allowed page types are executable, others are not.
 log "Fix any strange file permissions."