fix: update 8g-firewall rule config update script

.gitignore

@@ -3,4 +3,3 @@ nginx/custom/*
 php/custom/*
 ols/*
 custom/*
-config_backup/*

scripts/8g-firewall.sh

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Cleanup temp files on exit
+trap 'rm -f /tmp/8g-firewall-config-*' EXIT
+
+# Download and update configuration files
+# Run from: {SITE_DIR}/config directory
+
+# Configuration
+BASE_URL="https://raw.githubusercontent.com/t18d/nG-SetEnvIf/develop"
+FILES=(8g.conf 8g-firewall.conf)
+
+for filename in "${FILES[@]}"; do
+	dest_path="./nginx/common/$filename"
+	url="$BASE_URL/$filename"
+	tmpfile="/tmp/8g-firewall-config-$(date +%s)-$(basename "$filename")"
+
+	echo "Processing: $filename"
+
+	# Download file
+	if ! curl -fsSL -o "$tmpfile" "$url"; then
+		echo "❌ Failed to download"
+		rm -f "$tmpfile"
+		continue
+	fi
+
+	# Skip if unchanged
+	if [ -f "$dest_path" ] && cmp -s "$tmpfile" "$dest_path"; then
+		echo "✅ No changes"
+		rm -f "$tmpfile"
+		continue
+	fi
+
+	# Install new file
+	mkdir -p "$(dirname "$dest_path")"
+	mv "$tmpfile" "$dest_path"
+	chmod 0644 "$dest_path"
+	echo "✅ Updated: $dest_path"
+done
+
+echo "Add Done!"