Not able to require a local css file

My resources folder looks like this:

resources
    -css
       -bootstrap.min.css

I am trying to require a new bootstrap file like this in my start function:

...
pl.treksoft.kvision.require("./css/bootstrap.min.css")
...

However, I get a 404 not found error. Just as in the showcase example, I’ve got this copy resources task defined in my build.gradle:

task copyResources(type: Copy) {
    from "src/main/resources"
    into file(buildDir.path + "/js")
}

The copyResources task does the right thing and copies it into build/js/css/bootstrap.min.css, but it doesn’t let me require the css file in my code

[rjaros]

To override default bootstrap css you should add the <link href="css/bootstrap.min.css" rel="stylesheet"> to the index.html file, but the bootstrap.min.css file you want to use should be put into src/main/web/css directory (not the src/main/resources). No require() is necessary. This file (all files and directories from web) will be copied “as is” to the build/distributions/* and will be included in the page as a normal static file. You probably need to put fonts directory into web as well.

[rjaros]

Could you paste here the log with this 404 error? Is it from the browser console or from gradle process? Do you have this problem during development or production build?