Support config for self hosted plausible

data/siteMetadata.js

@@ -34,6 +34,8 @@ const siteMetadata = {
     },
     // plausibleAnalytics: {
     //   plausibleDataDomain: '', // e.g. tailwind-nextjs-starter-blog.vercel.app
+         // If you are hosting your own Plausible.
+    //   src: '', // e.g. https://plausible.my-domain.com/js/script.js
     // },
     // simpleAnalytics: {},
     // posthogAnalytics: {