build: add Docker image (#17017)

Co-authored-by: Daniel Kimsey <90741+dekimsey@users.noreply.github.com>

.release/ci.hcl

@@ -66,6 +66,20 @@ event "promote-staging" {
   }
 }
 
+event "promote-staging-docker" {
+  depends = ["promote-staging"]
+
+  action "promote-staging-docker" {
+    organization = "hashicorp"
+    repository   = "crt-workflows-common"
+    workflow     = "promote-staging-docker"
+  }
+
+  notification {
+    on = "always"
+  }
+}
+
 event "trigger-production" {
   // This event is dispatched by the bob trigger-promotion command  // and is required - do not delete.
 }
@@ -84,9 +98,23 @@ event "promote-production" {
   }
 }
 
-event "promote-production-packaging" {
+event "promote-production-docker" {
   depends = ["promote-production"]
 
+  action "promote-production-docker" {
+    organization = "hashicorp"
+    repository   = "crt-workflows-common"
+    workflow     = "promote-production-docker"
+  }
+
+  notification {
+    on = "always"
+  }
+}
+
+event "promote-production-packaging" {
+  depends = ["promote-production-docker"]
+
   action "promote-production-packaging" {
     organization = "hashicorp"
     repository   = "crt-workflows-common"