Added PM2 config

ecosystem.config.js

@@ -0,0 +1,21 @@
+module.exports = {
+  apps: [
+    {
+      name: 'assembly',
+      exec_mode: 'cluster',
+      instances: 'max', 
+      script: './node_modules/nuxt/bin/nuxt.js',
+      args: 'start',
+      env: {
+        NODE_ENV: 'production',
+        HOST: 'localhost',
+	PORT: 4000,
+      },
+      env_production: {
+        NODE_ENV: 'production',
+        PORT: '4000',
+	HOST: 'localhost'
+      },
+    },
+  ],
+}