Edited README

README.md

@@ -1,7 +1,16 @@
-# `up` — quick nginx server blocks
+# `up` — quick server blocks
+
+> ⚠️
+🚫
+`up` is not ready for use yet! It's in pre-release.
 
 **`up`** is a command line application to create nginx server blocks quickly in a single command.
 
+You will need to have nginx installed.
+https://nginx.org
+
+### Examples:
+
 `up static example.com` will serve a static website from current folder.
 
 `up proxy example.com 8081` will create a reverse proxy listening at port 8081.