chore: improve deploy script

Author: kenjis

admin/userguide/.github/scripts/deploy renamed to admin/userguide/.github/scripts/deploy.sh

@@ -5,8 +5,13 @@
 # codeigniter4/userguide repo's master branch.
 # See https://github.com/codeigniter4/userguide/blob/master/.github/workflows/deploy.yml
 
-REPO=/opt/userguide
-SITE=/home/public_html/userguides/userguide4
+REPO="/opt/userguide"
+SITE="/home/public_html/userguides/userguide4"
+
+if [ "$(id -u)" = "0" ]; then
+    echo "Cannot be run as root. Please run as the user for deployment."
+    exit 1
+fi
 
 cd "$REPO"
 git switch master

admin/userguide/.github/workflows/deploy.yml

@@ -4,7 +4,7 @@ name: Deploy Production
 
 on:
   push:
-    branches: 
+    branches:
       - master
 
 jobs:
@@ -19,4 +19,4 @@ jobs:
           username: ${{ secrets.USERNAME }}
           key: ${{ secrets.KEY }}
           port: ${{ secrets.PORT }}
-          script: /opt/userguide/.github/scripts/deploy
+          script: /opt/userguide/.github/scripts/deploy.sh