Add initial production manual for fiddle.

alertserver/alerts.cfg

 # This file defines alerts to be triggered by the server.
 
 #
 # AlertServer should tolerate no errors.
 
 
 [[rule]]
 name = "AlertServer Errors"
 message = "The Error rate for the alertserver is too high, please check the logs."
 database = "skmetrics"
@@ skipping 631 matching lines @@
 conditions = ["x < 20"]
 actions = ["Email(infra-alerts@skia.org)"]
 auto-dismiss = true
 nag = "1h"
 
 #
 # Fiddle
 #
 [[rule]]
 name = "fiddle is failing to build"
-message = "Fiddle has failed to build at the last 2 chrome DEPS rolls. Search logs for \"Failed to build LKGR:\" and \"Successfully built:\"."
+message = "Fiddle has failed to build at the last 2 chrome DEPS rolls. https://skia.googlesource.com/buildbot/+/master/fiddle/PROD.md#build_fail"
 database = "skmetrics"
 query = "SELECT mean(value) FROM \"counter\" WHERE app='fiddle' AND \"name\"='builds-failed' AND time > now() - 10m"
 category = "infra"
 conditions = ["x >= 2"]
 actions = ["Email(infra-alerts@skia.org)"]
 auto-dismiss = true
 nag = "1h"
 
 [[rule]]
 name = "fiddle is failing to sync"
-message = "Fiddle has failed to sync to HEAD at least 2 times in a row. Search logs for \"Failed to update skia repo\"."
+message = "Fiddle has failed to sync to HEAD at least 2 times in a row. https://skia.googlesource.com/buildbot/+/master/fiddle/PROD.md#sync_fail"
 database = "skmetrics"
 query = "SELECT mean(value) FROM \"counter\" WHERE app='fiddle' AND \"name\"='repo-sync-failed' AND time > now() - 10m"
 category = "infra"
 conditions = ["x >= 2"]
 actions = ["Email(infra-alerts@skia.org)"]
 auto-dismiss = true
 nag = "1h"