Seems to be a lot of 'looking for file router.min.js'. Could be a version conflict and it got moved?
So. Do you have the file on your system? Do you have a vendor folder with friendsofsymphony and inside that js routing bundle?
I have not tried to use docker for windows myself, but looking to see if a referenced folder exists under this type of error is pretty common. You may be able to find a js routing bundle version somewhere that has the referenced file or perhaps non-minified files that could be bundled together.
I was also under the impression this docker was for Debian, which is a Linux distribution. Are you running your windows docker in a simulated linux debian environment (or does it do that)? If you don't wish to install Debian or a virtual box for it, you might want to try getting a free Cloud Oracle VPS and setting up a Debian instance there - just beware of their extremely annoying double firewall which has often tripped me up.
Also, it is just called kbin, not kbin.social - the latter is the name of the website running kbin. -wink-