Update ecosystem for pm2

server/ecosystem.config.js

@@ -1,7 +1,7 @@
 module.exports = {
   apps : [{
     name: 'NoteServer',
-    script: 'index.js',
+    script: 'server/index.js',
 
     // Options reference: https://pm2.io/doc/en/runtime/reference/ecosystem-file/
     // args: 'one two',