Added custom 502 page and restart script

Temporary fix for the crash problem.

tomcat-restart.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+# There's a problem with YouYesYet which causes Tomcat to fall over
+# from time to time; it needs fixed. This is a temporary stopgap
+# simon, 20180918
+
+wget -S https://www.projecthope.scot 2>&1 | grep 'HTTP/1.1 5'
+
+if [ "$?" = "0" ]
+then
+    header=`wget -S https://www.projecthope.scot 2>&1 | grep 'HTTP/1.1 5'`
+    timestamp=`date`
+    echo "${timestamp} : ${header} : Restarting Tomcat"
+    service tomcat8 restart
+fi
+