Resolve issue avoiding preview-task to run

[jgomo3]

First problem:

$ grunt preview-live
Running "jshint:gruntfile" (jshint) task

   Gruntfile.js
>> ES5 option is now set per default

>> 1 error in 1 file
Warning: Task "jshint:gruntfile" failed. Use --force to continue.

Aborted due to warnings.

As mentioned in this article and discoused in this issue The solution is to remove the option ES5 from .jshintrc.

Second problem:

$ grunt preview-live
Running "jshint:gruntfile" (jshint) task
>> 1 file lint free.

Running "jshint:app" (jshint) task
>> 2 files lint free.

Running "jshint:test" (jshint) task
>> 1 file lint free.

Running "qunit:files" (qunit) task
Testing test/index.html .OK
>> 1 assertions passed (95ms)

Running "clean:files" (clean) task

Running "requirejs:compile" (requirejs) task

Running "concat:dist" (concat) task
File dist/require.js created.

Running "uglify:dist" (uglify) task
File dist/require.min.js created: 330.82 kB → 101.33 kB

Running "connect:production" (connect) task
Warning: Arguments to path.resolve must be strings Use --force to continue.

Aborted due to warnings.

Rewrited the middleware option following the documentation

And:

$ grunt preview-live
Running "jshint:gruntfile" (jshint) task
>> 1 file lint free.

Running "jshint:app" (jshint) task
>> 2 files lint free.

Running "jshint:test" (jshint) task
>> 1 file lint free.

Running "qunit:files" (qunit) task
Testing test/index.html .OK
>> 1 assertions passed (64ms)

Running "clean:files" (clean) task

Running "requirejs:compile" (requirejs) task

Running "concat:dist" (concat) task
File dist/require.js created.

Running "uglify:dist" (uglify) task
File dist/require.min.js created: 330.82 kB → 101.33 kB

Running "connect:production" (connect) task
Waiting forever...
Started connect web server on http://0.0.0.0:8000