Add self-minify instructions

README.md

@@ -1,3 +1,13 @@
 # tEnvoy
 
 More details coming soon...
+
+## Minify
+If you would like to minify the code yourself instead of using the provided `tenvoy.min.js` (and optional `tenvoy.min.js.map`), you can use [UglifyJS 3](https://github.com/mishoo/UglifyJS) to minifiy the code yourself.
+
+To install UglifyJS 3 as a command line app through NPM, run `npm install uglify-js -g`.
+
+After UglifyJS 3 has been installed, you can run the following command in your terminal:
+```bash
+uglifyjs tenvoy.js -o tenvoy.min.js -c -m --source-map "filename='tenvoy.min.js.map',url='tenvoy.min.js.map'"
+```