add warning about RAM to contributing guide (#1112)

diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
index 6d095cc474ded3ae74710eed53b478a2e84d343c..4b352922eb8572ef1de3aa4a5308c51f6fd8fbdd 100644 (file)
--- a/.github/CONTRIBUTING.md
+++ b/.github/CONTRIBUTING.md
@@ -44,7 +44,9 @@ before you start working on them :).
 
 ### Prerequisites
 
-First, make sure that you have followed 
+First, you should use a server or PC with at least 4GB of RAM. Less RAM may lead to crashes.
+
+Make sure that you have followed 
 [the steps](/support/doc/dependencies.md) 
 to install the dependencies.
 
@@ -173,4 +175,4 @@ $ npm run mocha -- --exit --require ts-node/register/type-check --bail server/te
 ```
 
 Instance configurations are in `config/test-{1,2,3,4,5,6}.yaml`.
-Note that only instance 2 has transcoding enabled.
\ No newline at end of file
+Note that only instance 2 has transcoding enabled.