Fix nginx configuration issues with variable expansion

init-letsencrypt.sh

@@ -93,8 +93,11 @@ EOF
 header "Configuring Nginx"
 echo "Generating Nginx configuration..."
 
-export DOMAIN_NAME=$domains
-envsubst < ./nginx/app.conf.template > ./nginx/app.conf
+# Use sed instead of envsubst to only replace DOMAIN_NAME without affecting nginx variables
+cp ./nginx/app.conf.template ./nginx/app.conf
+sed -i "s/\${DOMAIN_NAME}/$domains/g" ./nginx/app.conf
+
+echo "Generated nginx configuration for domain: $domains"
 
 # Stop any existing services
 echo "Stopping any existing services..."