Merge branch '1194-add-high-availability-section-to-production-md-document' into 'master'

Resolve "Add High Availability Section to sample_prod_config.md document"

Closes #1194

See merge request platform-one/big-bang/bigbang!2187

docs/understanding-bigbang/configuration/sample-prod-config.md

@@ -326,3 +326,7 @@ addons:
 
               service_registration "kubernetes" {}
 ```
+
+## High Availability (HA)
+
+Each package in Big Bang includes documentation of its own High Availability configuration independently in [Package Architecture](../package-architecture).