fix: Always strip trailing slash on canonical links

app/scenes/Document/Shared.tsx

@@ -119,7 +119,10 @@ function SharedDocumentScene(props: Props) {
   return (
     <>
       <Helmet>
-        <link rel="canonical" href={canonicalOrigin + location.pathname} />
+        <link
+          rel="canonical"
+          href={canonicalOrigin + location.pathname.replace(/\/$/, "")}
+        />
       </Helmet>
       <Layout title={response.document.title} sidebar={sidebar}>
         <Document

server/routes/index.ts

@@ -56,7 +56,7 @@ const renderApp = async (
   const {
     title = "Outline",
     description = "A modern team knowledge base for your internal documentation, product specs, support answers, meeting notes, onboarding, & more…",
-    canonical = ctx.request.href,
+    canonical = "",
   } = options;
 
   if (ctx.request.path === "/realtime/") {