[CORD-1569]
Autogenerate documentation of build system variables

Change-Id: I839f46d681e8f6954316f0ea4e9a79395501459f
diff --git a/.gitignore b/.gitignore
index 03e36cd..7f48339 100644
--- a/.gitignore
+++ b/.gitignore
@@ -46,9 +46,12 @@
 
 # GitBook
 _book
-docs/xos
+docs/api
+docs/build_glossary.md
+docs/platform-install
 docs/profiles
 docs/test
+docs/xos
 docs/xos-gui
 docs/xos-tosca