docs: update deployment doc

docs/middleware/intro.md

@@ -0,0 +1,23 @@
+---
+title: Intro
+layout: default
+parent: Middleware
+nav_order: 1
+---
+# Middlewares
+
+Middleware is a function executed before (or after) the route callback.
+
+This is a great way to add API authentication checks, or to validate that the user has permission to access the route.
+
+With Goma you can create your middleware based on the type you want and apply it on your routes
+
+Goma Gateway supports :
+
+- Authentication middleware
+    - JWT `client authorization based on the result of a request`
+    - Basic-Auth
+    - OAuth
+- Rate limiting middleware
+    - In-Memory client IP based
+- Access middleware