get request is not working after changing path resolve.Need an help in express node.js

I am working in MEAN stack project. In my project I have an admin and client module.

Here is my folder structure

 - admin
    - templates
    - controller
    - app.js
 - client
    - templates
    - controller
    - app.js
 - server.js

For removing # tag from url I have added html5mode true and the following code in server.js file

app.get('/*', function (req, res, next) {
    res.sendFile(path.resolve('client/index.html'));
});

app.get('/admin/*', function (req, res, next) {
    res.sendFile(path.resolve('admin/index.html'));
});

Here is my server.js file

    var express = require('express');
    var bodyParser = require('body-parser');
    var app = express();

    var path = require('path');

    var session = require('express-session');
    var mongoose = require('mongoose');

    mongoose.connect('mongodb://localhost/edb');

    app.all('/', function(req, res, next) {
        res.header("Access-Control-Allow-Origin", "*");
        res.header("Access-Control-Allow-Headers", "X-Requested-With");
        next()
      });

    app.use(session({secret: 'keyboard cat', cookie: { maxAge: 60000 }, resave: true, saveUninitialized: true }))


    app.use('/', express.static('app', { redirect: false }));


app.get('/*', function (req, res, next) {
    res.sendFile(path.resolve('client/index.html'));
});

app.get('/admin/*', function (req, res, next) {
    res.sendFile(path.resolve('admin/index.html'));
});
app.get('/api/enquiry', function(req, res)
{
    console.log("hai");
    dbenq.find(function(err, enquiry){
        if(err)
            res.send(err);
        res.json(enquiry);
    });
});

Please help to find out the solution

Thank you

via Athi