Adds a very simple readme

README.md

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+# Resize NC Listener
+
+This is designed to be used in place of a nc listener.
+
+## Usage
+
+```bash
+resize-netcat-listener 4444
+```
+
+This will listen on port 4444 for an incoming connection. Nothing ground breaking here. If you want it to listen on UDP, you can specify the `-u` flag.
+
+The interesting part (in my opinion) is that you can specify a command to be run when the window is resized.
+
+```bash
+resize-netcat-listener -r examples/stty-resize-copy 4444
+```
+
+This example will determine the new size of the window and put an appropriate stty command on the clipboard. This is useful if you have got a reverse shell as the remote shell isn't able to listen for resize events.
+
+
+## Sources
+
+Some code was taken from here: <https://github.com/vfedoroff/go-netcat>