Unable to write in the "/srv/app/public/uploads" directory

[JWBrownie]

Hey I am fairly new to all this, and I cannot make it work on uploading files, it's just not working for me, I cannot find anyone having the same issue so probably I am just too bad doing this, can anyone advise? Please!

So I tried attaching a volume like this

- ./symfony-files:/srv/app/public

And I still get the same error which is:

Unable to write in the "/srv/app/public/uploads" directory.

[JWBrownie]

So I did more digging and I found out some more details:
dd(exec('whoami'));
Outputs
www-data
so the user running PHP is that one, then I proceed to found out who is the owner of the targeted directory with:
dd(exec("ls -la " . $this->getParameter('kernel.project_dir') . '/public/uploads'));
Outputs
^ "drwxr-xr-x 4 1000 1000 4096 Jun 29 23:44 .."

So obviously the issue is that we got 2 different owners www-data cannot write to directory owned by 1000, so my question is why does this docker-compose setup is not aligning the users cross containers? Is there a way I could fix this? I'll keep trying if I find the solution I'll post it, but please if you can help me that'd be awesome!