Update README.md

Author: c3l3si4n

README.md

@@ -1,2 +1,17 @@
 # r-u-flooded
 🦀 UDP-based DoS (Denial of Service) stress testing and Denial of Service tool made in Rust.
+
+
+## Build
+
+```bash
+apt-get install cargo
+cargo build
+./target/debug/r-u-flooded
+```
+
+## Usage
+
+```bash
+./r-u-flooded <ip address> <number of threads> <time (0 for infinite)>
+```