Set up indexes for BlissOS and infra directories

Change-Id: Ie44bdb73ad74e80414bbccb81f6eec025f37507d
diff --git a/README.md b/README.md
index d3bbf82..11e97c9 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,6 @@
 ## Structure
 
  - [`blissroms/`](blissroms/index.md) - documents BlissRoms specific documentation
- - `blissos/` - documents Bliss OS specific documentation
+ - [`blissos/`](blissos/index.md) - documents Bliss OS specific documentation
  - [`common/`](common/index.md) - documents common documentation
- - `infrastructure/` - documents server provisioning and other miscellaneous details
+ - [`infrastructure/`](infrastructure/index.md) - documents server provisioning and other miscellaneous details