Restore docbook for now

This commit restores docbook as we miss several features (anchors, etc).

initializr-docs/src/main/asciidoc/index.adoc

@@ -23,8 +23,8 @@ Stéphane Nicoll; Dave Syer
 
 // ======================================================================================
 
-include::documentation-overview.adoc[leveloffset=+1]
-include::user-guide.adoc[leveloffset=+1]
-include::configuration-guide.adoc[leveloffset=+1]
-include::api-guide.adoc[leveloffset=+1]
+include::documentation-overview.adoc[]
+include::user-guide.adoc[]
+include::configuration-guide.adoc[]
+include::api-guide.adoc[]
 // ======================================================================================

initializr-docs/src/main/asciidoc/user-guide.adoc

@@ -20,7 +20,7 @@ arrow keys and `Enter` to select the "Web" starter.
 
 Your browser should now be in this state:
 
-image::web-selected.png[]
+image::web-selected.png[Browser,1200, 720]
 
 NOTE: The Spring Boot version above probably doesn't match the one you have. As we will
 see later, start.spring.io is continuously updated as new Spring Boot versions are