isRelativePath is added to better support the option of wanting relative asset paths or absolute asset paths. This is necessary in some use cases where ember-engines are used in applications.
In the config/environment.js
theme: {
isRelativePath: true //assets will be given a relative URL
}
theme: {
isRelativePath: false //assets will have an absolute URL
}
theme: {
//nothing configured for isRelativePath will default it to true
}