1 files changed, 4 insertions, 0 deletions

diff --git a/cdn/CONTRIBUTE.md b/cdn/CONTRIBUTE.md

index ceca896c..7cc673d9 100644
--- a/cdn/CONTRIBUTE.md
+++ b/cdn/CONTRIBUTE.md
@@ -12,3 +12,7 @@ npm start
 ```
 npm test
 ```
+
+#### common errors:
+
+-   db not connecting --> start mongod in a seperate terminal window