chore: Extract product name from translation strings (#4646)

server/routes/app.ts

@@ -64,7 +64,7 @@ export const renderApp = async (
   } = {}
 ) => {
   const {
-    title = "Outline",
+    title = env.APP_NAME,
     description = "A modern team knowledge base for your internal documentation, product specs, support answers, meeting notes, onboarding, & more…",
     canonical = "",
   } = options;