perf(docs-infra): improve app configuration

- Remove trailing slash redirect (e.g., /overview no longer redirects to /overview/).
- Update static file matching: Resolves an issue where hashed files were being cached for up to 1 hour.

adev/firebase.json

@@ -3,6 +3,7 @@
     "target": "angular-docs",
     "public": "./build/browser",
     "ignore": ["**/.*"],
+    "trailingSlash": false,
     "headers": [
       {
         "source": "assets/images/tutorials/common/*.jpg",
@@ -18,7 +19,7 @@
         ]
       },
       {
-        "source": "*.[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f].+(css|js)",
+        "source": "\\.*-[a-zA-Z0-9]{8}\\.[a-z]{3,4}$",
         "headers": [
           {
             "key": "Cache-Control",