Not AWS specific but maybe this is what you're looking for? Should be able to get you there.
Hell's bells... No clue why that link a'la old school markdown syntax is broken. Try this:

Hi Everyone!
First thanks and congrats for this beautiful, fast and functional way to interact with a community.
Experienced with html css and joomla, i started yesterday my first VPS and experience with linux system.
After couples of tries, i successfully installed a functional version on the VPS with a clean distribution of Ubuntu 14.10 with help of this tutorial . (i do own my own VPS on ovh hosting, not like the tuto.)
Apparently everything seems to work, except when i want to post a new topic. A bit inconvenient should i say. Function is working when i try it on the recent post page. Except on this page, whenever i click on new topic nothing happen.
Any thought?
Thanks in advance and keep it up, it's a great product !
(Apologies in advance, my skills in linux system are near from zero, so I might ask real beginner question... but will try to refer to my friend google as much as possible.)
Please install the latest versions of the theme you are using lavender/vanilla/persona etc.
Thanks for your answer!
May i ask if i need to enter a special command to upgrade it or can i just use the npm install command + the wanted theme to override the current one... ?
Yes just npm install will work ie ;
npm i nodebb-theme-vanilla
npm i nodebb-theme-lavender
Perfect thanks