Update Readme

README.md

@@ -1,10 +1,37 @@
 # elmjs-inspect
 
-## Running it
+## Build it
 
 ```sh
-npm build
-node dist/index.js analyze <filename>
+npm i
+npm run build
+npm link
+```
+
+## Run it
+
+Size contribution of each function
+
+```
+elmjs-size elm.js
+```
+
+Size contribution by modules
+
+```
+elmjs-size --summary=module elm.js
+```
+
+Size contribution by package
+
+```
+elmjs-size --summary=package elm.js
+```
+
+Size contribution of only the project's modules
+
+```
+elmjs-size --summary=project elm.js
 ```
 
 ## TODO