Update README.md

Author: hadefication

README.md

@@ -5,7 +5,7 @@
 - [Composer](https://getcomposer.org/)
 
 ## Installation
-This assumes that PHP and Composer is already installed. To install the command do:
+This assumes that PHP and Composer is already installed. This also assumes that the Composer's bin is already added to your path (Add `export PATH=~/.composer/vendor/bin:$PATH` to your `.zshrc` ). To install the command do:
 - Open the terminal and run `composer global require webteractive/devstack`. This will install a CLI command `devstack`.
 - Set the configuration by running `devstack config`. This command will ask the `repository`, `branch`, and `token`.
 - Once the configuration is set, you can now initialize the EN runtimes. Just run `devstack init <runtime>`. The `<runtime>` can be `aac`, `eepower`, and `control` so to load up AllAboutCircuits runtime, all you have to do is do `devstack init aac`.