add docs

docs/modules/ROOT/pages/index.adoc

@@ -33,6 +33,7 @@ This image is based on the popular Alpine Linux project, available in the alpine
 
 This variant is useful when final image size being as small as possible is your primary concern. The main caveat to note is that it does use musl libc instead of glibc and friends, so software will often run into issues depending on the depth of their libc requirements/assumptions.
 
+TIP: Note that this image is somewhat heavy (~1GB). It can take some time to build the Instance. If you think the proccess is frosen you can reload the page in your Browser
 
 == More info