.env
server.js
/admin               //angular 4 app directory
    index.html
    ....other angular files and assets folder
/modules
/config
...other files and folders at root level

app.get('/admin', (req, res) => {
      res.sendFile(path.join(__dirname, 'admin/index.html'));
});

SyntaxError: expected expression, got '<'[Learn More]
                                                    inline.a808723d583c934ba8bf.bundle.js:1

SyntaxError: expected expression, got '<'[Learn More]
                                                    polyfills.5d1d5b016f19755a7d41.bundle.js:1

SyntaxError: expected expression, got '<'[Learn More]
                                                    main.036acd83ead6248588f0.bundle.js:1