Add VPS deployment environment example

deploy/vps/.env.example

@@ -0,0 +1,20 @@
+# VPS-only deployment config
+# FastPanel sites/domains are created manually in FastPanel UI.
+
+PROJECT_ROOT=/opt/raspi-chat
+SOURCE_PATH=/opt/raspi-chat/source
+DATA_PATH=/opt/raspi-chat/data
+LOGS_PATH=/opt/raspi-chat/logs
+BACKUPS_PATH=/opt/raspi-chat/backups
+
+ADMIN_WEBROOT=/var/www/example_user/data/www/admin.example.ru
+WIDGET_WEBROOT=/var/www/example_user/data/www/widget.example.ru
+
+BACKEND_HOST=127.0.0.1
+BACKEND_PORT=3000
+PUBLIC_API_URL=https://api.example.ru
+PUBLIC_WS_URL=wss://api.example.ru/ws
+
+FASTPANEL_SAFE_MODE=true
+PM2_PROCESS_NAME=raspi-chat-backend
+NODE_MAJOR=20