Adding html page to Yii2 basic

I have a running website on yii2, but wanted to host pwa app on the same url. I want to run it on
I tried putting the html and js files to the web directory, but opening gives me 404 error, other files do open, but not main index.html file

Because it’s index.php?

My webapp is index.html

There is only one working file named index.*.
What file *.php or *.html is working you will see in .htaccess / apache settings