Allow slashes in tracker names.

docker/middleware.js

@@ -24,7 +24,7 @@ function customScriptName(req) {
   if (scriptName) {
     const url = req.nextUrl.clone();
     const { pathname } = url;
-    const names = scriptName.split(',').map(name => name.trim());
+    const names = scriptName.split(',').map(name => name.trim().replace(/^\/+/, ''));
 
     if (names.find(name => pathname.endsWith(name))) {
       url.pathname = '/script.js';