update readme

README.md

@@ -1,2 +1,30 @@
 # buckets-of-fun
 
+## Usage
+
+`buckets-of-fun` takes a first argument of the target size.
+The following arguments are the size of the buckets required.
+
+```bash
+main.js target bucket [bucket...]
+
+target: volume of bucket to search for
+bucket: volume of bucket
+```
+
+
+## Install
+
+If node is installed, you can run directly by running:
+
+```bash
+$ node ./main.js 4 3 5
+```
+
+The node script can also be run from inside a docker container.
+To build and run, you can following the commands below.
+
+```bash
+$ docker build . -t buckets-of-fun
+$ docker run buckets-of-fun 4 3 5
+```