Deployed to https://embed.scotty.workers.dev/
/meta?fooBar=Baz
will render <meta property="foo:bar" content="baz">
There are four exceptions:
/meta?title=blah
will render <title>blah</title>
/meta?favicon=blah
will render <link rel="icon" href="blah" type="image/png">
(only PNGs are supported)
/meta?theme=ffffff
will render <meta name="theme-color" content="#ffffff">
/meta?oeKey=Value
will render <link type="application/json+oembed" href=".../oembed?key=value">
Ie. use the "oe" prefix to set oembed values. All other prefixes will be used to render open graph meta tags.