Add logo for Github and update doc index

docs/index.md

@@ -1,5 +1,9 @@
 # FastAPI Users
 
+<p align="center">
+  <img src="https://raw.githubusercontent.com/frankie567/fastapi-users/master/logo.svg" alt="FastAPI Users">
+</p>
+
 <p align="center">
     <em>Ready-to-use and customizable users management for FastAPI </em>
 </p>
@@ -11,3 +15,17 @@
 **Source Code**: <a href="https://github.com/frankie567/fastapi-users" target="_blank">https://github.com/frankie567/fastapi-users</a>
 
 ---
+
+## Work in progress 🚧
+
+This library is currently in early stage development. First working version soon!
+
+## Features
+
+* Extensible base user model
+* Ready-to-use register, login, *forgot and reset password routes ([#3](https://github.com/frankie567/fastapi-users/issues/3))*
+* Customizable database backend
+    * SQLAlchemy backend included
+    * *MongoDB backend included ([#4](https://github.com/frankie567/fastapi-users/issues/4))*
+* Customizable authentication backend
+    * JWT authentication backend included