Update README.md

Author: spdegabrielle

README.md

@@ -1,3 +1,16 @@
 cli-command
 ===========
-README text here.
+
+To create an executable 
+`$ raco exe -o hello hello.rkt`
+
+This will create an executabe `hello` or `hello.exe` depending on your platform.
+
+For help
+
+`$ ./hello -h` or `hello.exe -h` 
+
+
+Creating executables: https://docs.racket-lang.org/raco/exe.html
+
+Command-line parsing: https://docs.racket-lang.org/reference/Command-Line_Parsing.html