Do we need an index file in fiori launchpad ?

Dear friends,

       I am new to fiori application. Recently I create a ui5 application and deploy to my gateway system and config it to the FLP. But when we test the UI we run the index.html file in the ABAP server. When we create the Launchpad role, we use UI5.Component=<route> to link the component.js file.          So I am very confuse about this, Do we need the index file in our fiori application or just the component.js ?  if we just need the component.js how do we load the script recourse like this :

<script src="https://sapui5.hana.ondemand.com/resources/sap-ui-core.js"

  id="sap-ui-bootstrap"

  data-sap-ui-libs="sap.m,sap.ushell, sap.collaboration"

  data-sap-ui-resourceroots='{"Demo": "./"}'

  data-sap-ui-compatVersion="edge"

  data-sap-ui-theme="sap_bluecrystal">

  </script>

My app:

Launchpad Role:

Thanks for your sincerely answer!

Zhang!