add pm2 ecosystem file

ecosystem.config.js

@@ -0,0 +1,10 @@
+// This is a configuration file for pm2, a production process manager for nodejs
+module.exports = {
+  apps : [{
+    name   : "lean4web",
+    script : "server/index.js",
+    env: {
+       NODE_ENV: "production",
+    },
+  }]
+}