Adding update script (Koenkk#525)

* Adding update script

Fix Koenkk#389

* Update update.sh :)

* Make executable & update update.sh

.gitignore

@@ -62,4 +62,5 @@ data/database.db
 data/config.json
 data/log*.txt
 data/state.json
-data/log
+data/log
+data-backup/

update.sh

@@ -0,0 +1,24 @@
+#!/bin/bash -e
+
+echo "Stopping zigbee2mqtt..."
+sudo systemctl stop zigbee2mqtt
+
+echo "Creating backup of configuration..."
+cp -R data data-backup
+
+echo "Updating..."
+git checkout HEAD -- npm-shrinkwrap.json
+git pull
+
+echo "Installing dependencies..."
+rm -rf node_modules
+npm install
+
+echo "Restore configuration..."
+cp -R data-backup/* data
+rm -rf data-backup
+
+echo "Starting zigbee2mqtt..."
+sudo systemctl start zigbee2mqtt
+
+echo "Done!"