feat: add backend-mock app

apps/backend-mock/ecosystem.config.cjs

@@ -0,0 +1,23 @@
+module.exports = {
+  apps: [
+    {
+      autorestart: true,
+      cwd: './',
+      env: {
+        NODE_ENV: 'production',
+      },
+      env_development: {
+        NODE_ENV: 'development',
+      },
+      env_production: {
+        NODE_ENV: 'production',
+      },
+      ignore_watch: ['node_modules', '.logs', 'dist'],
+      instances: 1,
+      max_memory_restart: '1G',
+      name: '@vben/backend-mock',
+      script: 'node dist/main.js',
+      watch: false,
+    },
+  ],
+};