feat: add readme

Author: ctrlaltdev

README.md

@@ -0,0 +1,17 @@
+Catch All Test HTTP Server
+
+## Usage
+
+```sh
+srv42
+```
+
+To use another port than 1337:
+```sh
+srv42 -p 5000
+```
+
+To response another status than 202:
+```sh
+srv42 -s 204
+```