Removed useless cd in update_server

scripts/ecosystem.config.json

 {
   "apps": [
     {
-      "script": "../server/index.js",
+      "script": "server/index.js",
       "name": "tv-panel",
       "instances": "1",
       "exec_mode": "cluster"

scripts/update_server.sh

 #!/bin/bash
 
-CWD=$(pwd)
-
-DIRECTORY=$(cd `dirname $0` && pwd)
-cd $DIRECTORY
-
 # Pull code
 git fetch
 # git reset --hard origin/master
 
 # Install deps
-cd ../
 yarn install --pure-lockfile
 
 # Build front
 yarn build:front
 
 # Restart server
-cd scripts
-pm2 startOrRestart ecosystem.config.json
+pm2 startOrRestart ./scripts/ecosystem.config.json
 
 # Restart screen
 screen -S TVPanelScreen -X quit
-./start_tv_panel.sh
-
-cd $CWD
+./scripts/start_tv_panel.sh