[Privacy Gateway] onboarding guide

src/content/docs/privacy-gateway/get-started.mdx

@@ -2,7 +2,7 @@
 title: Get started
 pcx_content_type: get-started
 sidebar:
-  order: 3
+  order: 2
 
 ---
 

src/content/docs/privacy-gateway/privacy-proxy-onboarding.mdx

@@ -0,0 +1,14 @@
+---
+title: Privacy Proxy Onboarding Guide
+pcx_content_type: how-to
+sidebar:
+  order: 3
+
+---
+
+The Cloudflare Privacy Proxy consists of a generic HTTPS CONNECT (and CONNECT-UDP ) proxy.
+These may be used to ensure that knowledge of sensitive user information leaked in web traffic is not only available to those that need it to function.
+
+A high level overview of the system is shown below. Control plane services are shown in orange, whereas dataplane services are shown in blue.
+
+test