README: Write "Initialization" section

Author: kj4ezj

README.md

@@ -19,6 +19,7 @@ You can see it live at [https://stake.eosnetwork.com](https://stake.eosnetwork.c
 
 1. [Development](#development)
     1. [Prerequisites](#prerequisites)
+    1. [Initialization](#initialization)
 1. [See Also](#see-also)
 
 <!-- contents markdown end -->
@@ -50,6 +51,17 @@ You will need the following tools:
     ```
 These tools are all you need to get started!
 
+### Initialization
+Once you have the [prerequisites](#prerequisites) installed, you can get going by making sure `nvm` is using the correct version of nodeJS...
+```bash
+nvm install
+```
+...and then downloading all project dependencies.
+```bash
+yarn
+```
+Easy.
+
 ## See Also
 More resources.
 - [aws-cloudwatch-alarm-handler](https://github.com/eosnetworkfoundation/aws-cloudwatch-alarm-handler) lambda