add deprecation warnings to docs

website/source/docs/commands/push.html.md

@@ -9,6 +9,11 @@ sidebar_current: 'docs-commands-push'
 
 # `push` Command
 
+!> The Packer and Artifact Registry features of Atlas will no longer be
+actively developed or maintained and will be fully decommissioned on Friday,
+March 30, 2018. Please see our [guide on building immutable infrastructure with
+Packer on CI/CD](/guides/packer-on-cicd/).
+
 The `packer push` command uploads a template and other required files to the
 Atlas service, which will run your packer build for you. [Learn more about
 Packer in Atlas.](https://atlas.hashicorp.com/help/packer/features)
@@ -23,7 +28,7 @@ artifacts in Atlas. In order to do that you will also need to configure the
 [Atlas post-processor](/docs/post-processors/atlas.html). This is optional, and
 both the post-processor and push commands can be used independently.
 
-!> The push command uploads your template and other files, like provisioning
+~> The push command uploads your template and other files, like provisioning
 scripts, to Atlas. Take care not to upload files that you don't intend to, like
 secrets or large binaries. **If you have secrets in your Packer template, you
 should [move them into environment

website/source/docs/post-processors/atlas.html.md

@@ -10,6 +10,11 @@ sidebar_current: 'docs-post-processors-atlas'
 
 # Atlas Post-Processor
 
+!> The Packer and Artifact Registry features of Atlas will no longer be
+actively developed or maintained and will be fully decommissioned on Friday,
+March 30, 2018. Please see our [guide on building immutable infrastructure with
+Packer on CI/CD](/guides/packer-on-cicd/).
+
 Type: `atlas`
 
 The Atlas post-processor uploads artifacts from your packer builds to Atlas for

website/source/docs/templates/push.html.md

@@ -9,6 +9,11 @@ sidebar_current: 'docs-templates-push'
 
 # Template Push
 
+!> The Packer and Artifact Registry features of Atlas will no longer be
+actively developed or maintained and will be fully decommissioned on Friday,
+March 30, 2018. Please see our [guide on building immutable infrastructure with
+Packer on CI/CD](/guides/packer-on-cicd/).
+
 Within the template, the push section configures how a template can be
 [pushed](/docs/commands/push.html) to a remote build service.