I download Aurelia repository from
https://github.com/aurelia/
And run project successfully via webstrom on different port not on localhost:9000 without "gulp watch" .
But I installed Aurelia dependency then started project on webstorm its run successfully.
Steps for run project without "gulp watch"...
Run given command on command line from project folder.
Install the Apps dependencies - **npm install**
Install JSPM dependencies - **jspm install -y**
Install Gulp - **npm install gulp**
then explore your index.html page on chrome. Make sure you running Aurelia in Chrome, IE and Firefox.
I tested Aurelia application in Chrome, IE , Safari and Firefox result
Chrome - Pass
IE - Pass
Firefox - Pass
Safari - Fail
But in safari that was fail.