Grunt index file not running - gruntjs

Question

I am trying to get my index.html at the root of my app (app/index.html) running with grunt from I file I inherited.
My grunt file is as follows:
module.exports = function(grunt) {
// 1. All configuration goes here
grunt.initConfig({
pkg: grunt.file.readJSON('package.json'),
sass_directory_import: {
your_target: {
files: {
src: ['css/sass/parts/_all.scss']
},
},
},
connect: {
server: {
options: {
port: 9000,
hostname: 'localhost',
base: ['./'],
keepalive: true,
open: {
target: 'http://localhost:9000'
}
}
}
},
sass: {
dist: {
options: {
loadPath: require('node-bourbon').includePaths,
sourceMap: true
},
files: {
'css/style.css' : 'css/sass/style.scss',
'css/style-ie.css' : 'css/sass/style-ie.scss'
}
},
},
watch: {
sass: {
files: 'css/sass/**/*.scss',
tasks: ['sass_directory_import','sass']
}
}
});
// 3. Where we tell Grunt we plan to use this plug-in.
grunt.loadNpmTasks('grunt-sass');
grunt.loadNpmTasks('grunt-contrib-cssmin');
grunt.loadNpmTasks('grunt-contrib-concat');
grunt.loadNpmTasks('grunt-contrib-uglify');
grunt.loadNpmTasks('grunt-contrib-watch');
grunt.loadNpmTasks('grunt-sass-directory-import');
grunt.loadNpmTasks('grunt-contrib-connect');
// 4. Where we tell Grunt what to do when we type "grunt" into the terminal.
grunt.registerTask('default',['watch', 'connect:server']);
grunt.registerTask('build',['sass', 'uglify']);
};
I want index to appear under the port: http://localhost:9000 but when I run the default watch task, only get the sass files being watched for changes and nothing else. How do I get grunt to run the file under the given port? I have only used Gulp before and am not finding grunt very easy to work with. Is there a grunt server/connect task that does not have to be installed?