Add lessc to README.md

README.md

@@ -8,7 +8,8 @@ New new Thalia website, now with extra Django.
 Getting started
 ---------------
 
-0. Get at least Python 3.4 and install the Pillow requirements as per below
+0. Get at least Python 3.4 and install the Pillow requirements as per below.
+   Also make sure that you have `lessc` installed (see below).
 1. Clone this repository
 2. Run `source ./source_me.sh` (or use your own favourite virtualenv solution)
 3. Run `pip install -r requirements.txt`
@@ -37,7 +38,12 @@ For Ubuntu 16.04, use:
 
     apt-get install python-dev gettext gcc build-essential libtiff5-dev libjpeg62-turbo-dev zlib1g-dev libfreetype6-dev liblcms2-dev libwebp-dev
 
-For other operating systems, see the (Pillow Documentation)[pillow-install].
+For other operating systems, see the [Pillow Documentation][pillow-install].
 
 
 [pillow-install]: https://pillow.readthedocs.io/en/latest/installation.html
+
+NodeJS dependencies
+-----------------------
+1. `lessc`:
+   * For Ubuntu  use: `apt-get install node-less`