build: add pm2 ecosystem config.

ecosystem.config.js

@@ -0,0 +1,14 @@
+module.exports = {
+  apps: [
+    {
+      name: 'fennec-be',
+      script: 'npm',
+      args: 'run start:prod',
+      watch: false,
+      ignore_watch: ['node_modules'],
+      log_date_format: 'MM-DD HH:mm:ss.SSS Z',
+      env: {},
+      max_restarts: 5,
+    },
+  ],
+};