Add cron to debian dependencies

Just in case, needed by certbot

diff --git a/support/doc/dependencies.md b/support/doc/dependencies.md
index 1faf46c633d7a3ea06d07cebe40efa5f140dad76..20aac959601ce11aed7f22697e519443a16f5e0f 100644 (file)
--- a/support/doc/dependencies.md
+++ b/support/doc/dependencies.md
@@ -39,7 +39,7 @@ _note_: only **LTS** versions of external dependencies are supported. If no LTS
 
 ```
 sudo apt update
-sudo apt install certbot nginx ffmpeg postgresql postgresql-contrib openssl g++ make redis-server git python-dev
+sudo apt install certbot nginx ffmpeg postgresql postgresql-contrib openssl g++ make redis-server git python-dev cron
 ffmpeg -version # Should be >= 4.1
 g++ -v # Should be >= 5.x
 ```