chore: add pm2 config for deploy

ecosystem.config.js

@@ -0,0 +1,18 @@
+module.exports = {
+  apps: [
+    {
+      name: "explit",
+      script: "npm",
+      args: "start",
+      autorestart: true,
+      watch: false,
+      max_memory_restart: "1G",
+      env: {
+        NODE_ENV: "production",
+      },
+      env_production: {
+        NODE_ENV: "production",
+      },
+    },
+  ],
+};