Hi SSS,

Consider Following Files  dashoboard.js(JS File), dashboard.css (CSS File), dashboard_template.xml(Template File), dashboard_view.xml(View File)

First of all you need to define View and Template File in Manifest like below code

{
    'name': "Dashboard",
    'version': '1.0',
    'depends': ['base', 'web'],
    'data': [
        'view/dashboard_view.xml',
        ],
    'qweb': [
        'static/src/xml/dashboard_template.xml',
        ],
    'installable': True,
    'auto_install': True,
    'application': True
}

You need to define css and Js files in dashboard_view File like below

<template id="dashboard_assets" name="dashboard_files" inherit_id="web.assets_backend">
        <xpath expr="." position="inside">
                <link rel="stylesheet" href="/project_name/static/src/css/dashboard.css"/>
                <script type="text/javascript" src="/project_name/static/src/js/dashboard.js"/>
        </xpath>
</template>

Thanks.