chore: add info for public sector users re: Big Bang and Ironbank (#954)

Katie Horne · web-flow · commit 39833073118e · 2022-04-21T12:59:57.000-05:00
diff --git a/setup/installation.md b/setup/installation.md
@@ -17,6 +17,18 @@ Install the following dependencies if you haven't already:
 [PostgreSQL](https://www.postgresql.org/docs/12/admin.html) instance to store
 data, including workspace information and session tokens.
 
+## For public sector deployments
+
+Users with public sector deployments may need to obtain Coder's installation
+resources from
+[Big Bang](https://repo1.dso.mil/platform-one/big-bang/apps/developer-tools/coder)
+(Helm charts) and
+[Ironbank](https://repo1.dso.mil/dsop/coder-enterprise/coder-enterprise/coder-service)
+(installation images).
+
+> Both the Big Bang and Ironbank repositories are one release behind the latest
+> version of Coder.
+
 ## Create the Coder namespace (optional)
 
 We recommend running Coder in a separate
diff --git a/setup/upgrade/index.md b/setup/upgrade/index.md
@@ -38,6 +38,18 @@ This guide will show you how to upgrade your Coder deployment.
   helm repo add coder https://helm.coder.com
   ```
 
+## For public sector deployments
+
+Users with public sector deployments may need to obtain Coder's installation
+resources from
+[Big Bang](https://repo1.dso.mil/platform-one/big-bang/apps/developer-tools/coder)
+(Helm charts) and
+[Ironbank](https://repo1.dso.mil/dsop/coder-enterprise/coder-enterprise/coder-service)
+(installation images).
+
+> Both the Big Bang and Ironbank repositories are one release behind the latest
+> version of Coder.
+
 ## Upgrade Coder
 
 1. Retrieve the latest repository information:
