Solved: Opencart 3.0.2.0 Multi store with multi domain

Hi guys, I thought this would be easy, but I'm 3 hours in with no luck whatsoever. the problem:

I have a second domain (domainB.com) and wish to use it on my existing open cart shop installation with it's own store front (domainA.com)

I added the dns records, to point the domain to my vps
I edited added it's own virtual host file, with the document root pointing to the installation of domainA.com
I added the second store url & config in the opencart backend, created a category specially for domainB.com and added one of the products to that category.

I would expect when I now visit domainB.com that I get to see the same theme (for now) with 1 category with 1 product. but I keep seeing the domainA.com content.

It looks like for some reason it doesn't recognise me being on the new domainB.com url and just presenting me the domainA.com site (I can confirm this when I print config_store_id which = 0)

I have been browsing the opencart code for 2 hours, looking where the config_store_id is being set, to try and trackback why it isn't recognizing my new domain, but I can't seem to find the right location, the only code I find is in catalog/controller/startup/startup.php but that code never seems to get called.

If anyone can tell me where the config_store_id is being set that would help out a lot.

ok, I found the solution, after hours of digging, the problem was catalog/controller/startup/startup.php was being cached in the storage/modification folder (but not in the public_html storage folder, where I look the first time, which was empty, but in the storage folder outside of the public root dir. )

dumping the query that checks if the used domain is in the store table, showed me in the query there is a trailing slash after the domain for some reason...
SELECT * FROM store WHERE url = 'domainB.com/'

for now I added it in the store url setting (opencart backend -> settings) and voila, opencart found my new store, and displayed the category I added...

yes, you helped