added deploy frontend script

jenkins/deployBackend.sh

@@ -8,6 +8,8 @@ then
     ssh -i /etc/ssh/simco_key simco-jenkins@gitea.oliver.boehlk.io "rm -r ~/simco-dashboard/backend"
     echo 'Copy backend to OlberryPi'
     scp -i /etc/ssh/simco_key -r backend simco-jenkins@gitea.oliver.boehlk.io:~/simco-dashboard
+    echo 'Yarn install packages'
+    ssh -i /etc/ssh/simco_key simco-jenkins@gitea.oliver.boehlk.io "cd ~/simco-dashboard/backend && yarn install"
 else
     echo "Skipping for non-master branch"
 fi