gitbook needs separate home link

Author: mikemcdonald

.gitbook.yaml

@@ -1,5 +1,5 @@
 root: ./
 
 structure:
-  readme: ./getting-started/overview.md
+  readme: index.md
   summary: summary.md

index.md

@@ -0,0 +1,11 @@
+<p align=center>
+<img width="64px" src="https://balancer-labs.github.io/pebbles/images/pebbles-pad.256w.png" alt="balancer pebbles logo"/>
+</p>
+
+**Balancer** is an automated **portfolio manager**, **liquidity provider**, and **price sensor**.
+
+Balancer turns the concept of an index fund on its head: instead of a paying fees
+to portfolio managers to rebalance your portfolio, you collect fees from traders, who rebalance
+your portfolio by following arbitrage opportunities.
+
+Balancer is based on an N-dimensional invariant surface which is a generalization of the constant product formula described by Vitalik Buterin and proven viable by the popular Uniswap dapp.

summary.md

@@ -1,5 +1,7 @@
 # Table of contents
 
+* [Home](index.md)
+
 ## Getting Started
 
 * [Overview](getting-started/overview.md)