By accessing the right URL, you can have MediaWiki resize your image for you e.g. <nowiki>https://freephile.org/w/images/thumb/2/29/Freephile_large_logo.gif/177px-Freephile_large_logo.gif</nowiki>
For Meza/QualityBox, just put the logo into the config folder along with other favicon assets. Alternatively, 'Logo.png' or 'Logo.jpg' will automatically work from upload.