Merge pull request #213 from typelevel/doc/unidoc-root-aggregate

Add note about adding unidocs to root aggregate

Author: armanbilge

docs/site.md

@@ -34,6 +34,7 @@ For example, the sbt-typelevel `VERSION` is `@VERSION@` and `SNAPSHOT_VERSION` i
 If you generate your API documentation with [sbt-unidoc](https://github.com/sbt/sbt-unidoc), you can use the `TypelevelUnidocPlugin` to publish a Scaladoc-only artifact to Sonatype/Maven alongside your library artifacts. This makes it possible to browse your unidocs at [javadoc.io](https://www.javadoc.io/); for example, the sbt-typelevel [API docs](@API_URL@) are published like this.
 
 ```scala
+// Make sure to add to your root aggregate so it gets published!
 lazy val unidoc = project
   .in(file("unidoc"))
   .enablePlugins(TypelevelUnidocPlugin) // also enables the ScalaUnidocPlugin
@@ -44,4 +45,4 @@ lazy val unidoc = project
 
 ### How can I customize my website's appearance?
 
-We refer you to the comprehensive [Laika manual](https://planet42.github.io/Laika/index.html) and specifically the [`laikaTheme` setting](https://planet42.github.io/Laika/0.18/02-running-laika/01-sbt-plugin.html#laikatheme-setting).
+We refer you to the comprehensive [Laika manual](https://planet42.github.io/Laika/index.html) and specifically the [`laikaTheme` setting](https://planet42.github.io/Laika/0.18/02-running-laika/01-sbt-plugin.html#laikatheme-setting).