Use supercronic to schedule renovate

This makes it easier to restart, and makes more creative scheduling possible

ansible/roles/renovate/files/entrypoint.sh

@@ -2,10 +2,9 @@
 
 set -e
 
-while true;
-do
-    renovate $@
-    echo "> Sleeping for 1 hour..."
-    sleep 1h &
-    wait $!
-done
+curl -fsSL https://github.com/aptible/supercronic/releases/download/v0.2.1/supercronic-linux-amd64 -o ~/supercronic
+
+chmod +x ~/supercronic
+
+# Ever 2 hours between 08:00 and 23:00
+~/supercronic <(echo "0 8-23/2 * * *" renovate $@)