Add readme

README.md

@@ -1,5 +1,8 @@
 # DependencyGraph
 
+Get [d2](https://github.com/terrastruct/d2) config file from source code
+imports
+
 ## Install
 
 ## Binary (precompiled)
@@ -30,5 +33,14 @@ Go to the latest release and download the binary for your platform
 dg --help
 ```
 ```
+./dg 0.0.0
+-----------------------------------------------
+Usage: ./dg [options] [FOLDERS]
+
+Description: output d2 dependency graph
 
+Options:
+  -l, --language <string>   Language to use for the folders
+  -o, --output <string>     Output file
+  -h, --help                display this help and exit
 ```