Allow SW scope without a trailing slash (#1184)

This is something of a compromise and requires a header.

Author: microbit-matt-hillsdon

vite.config.ts

@@ -93,6 +93,11 @@ export default defineConfig(({ mode }) => {
       VitePWA({
         disable: !featurePwa,
         registerType: "autoUpdate",
+        // Remove the trailing slash so we can serve from e.g. /v/3 not just /v/3/
+        // This requires the corresponding service-worker-allowed header to be set.
+        // URLs are prefix matched so it's a compromise solution that could affect other
+        // paths sharing the same prefix
+        scope: process.env.BASE_URL?.replace(/\/$/, ""),
         workbox: {
           cacheId: pwaCacheId,
           // Only precache language assets for the fallback language.