repeat admonition about ubuntu's mongodb package vs mongodb's mongodb-org package

Author: kay-kim

source/includes/important-dont-use-distro-packages.rst

@@ -2,7 +2,7 @@
 
    The unofficial ``mongodb`` package provided by |distro-name| is
    **not** maintained by MongoDB and conflict with MongoDB's offically
-   supported packages. You should always use the official MongoDB
+   supported packages. Use the official MongoDB
    |package-name| packages, which are kept up-to-date with the most
    recent major and minor MongoDB releases.
 

source/tutorial/install-mongodb-on-ubuntu.txt

@@ -48,6 +48,8 @@ Install MongoDB Community Edition
 Using ``.deb`` Packages (Recommended)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
+.. include:: /includes/important-dont-use-distro-packages.rst
+
 .. include:: /includes/steps/install-mongodb-on-ubuntu.rst
 
 Using ``.tgz`` Tarballs