setup reverse proxy for CVAT server

[zvant]

I am trying to setup a reverse proxy for CVAT server. In a network, I have two servers, say A.net and B.net. Only A.net can be accessed from outside, and it has Apache2 installed. On B.net, I have CVAT server configured and running at port 8080. Because B.net cannot be seen from outside, I setup a reverse proxy on A.net with the Apache2 configuration
ProxyPass "/cvat" "http://B.net:8080"
ProxyPassReverse "/cvat" "http://B.net:8080"

I have tried to visit http://B.net:8080 from A.net, and everything looks fine. However, when I tried to visited http://A.net/cvat from outside, it can only show the title "Computer Vision Annotation Tool", but no page content. The browser concole shows a 404 error:
GET http://A.net/cvat-ui.580642541947bec0314e.min.js net::ERR_ABORTED 404 (Not Found)
Can someone please tell me what I did wrong in the configurations? Thanks.

[bsekachev]

I see it tries to get JS bundle from:

http://A.net/cvat-ui.580642541947bec0314e.min.js, not from http://A.net/cvat/cvat-ui.580642541947bec0314e.min.js. Can it be a reason?

[bsekachev]

If you take a look into generated index.html (cvat-ui/dist/index.html)
In my case it has for example:

<script type="text/javascript" src="/cvat-ui.2120f64655f5abf28675.min.js"></script></body>

JS bundle URL is absolute and it ignores URL path cvat/. Probably webpack can be configured to fix it.

But all what I said are only my guesses.