Update ubuntu.rst

docs/installing/os/ubuntu.rst

@@ -6,7 +6,7 @@ First, we install our base software stack:
 
 .. code:: bash
 
-	$ apt-get install git nodejs redis-server imagemagick
+	$ apt-get install git nodejs redis-server imagemagick npm
 
 
 If you want to use MongoDB, LevelDB, or another database instead of Redis please look at the :doc:`Configuring Databases <../configuring/databases>` section.
@@ -55,4 +55,4 @@ Lastly, we run the forum.
 	$ ./nodebb start
 
 
-NodeBB can also be started with helper programs, such as ``supervisor`` and ``forever``. :doc:`Take a look at the options here <../../running/index>`.
+NodeBB can also be started with helper programs, such as ``supervisor`` and ``forever``. :doc:`Take a look at the options here <../../running/index>`.