Refactor configuration handling: implement dynamic loading of config and cache paths for improved security and flexibility in Docker environments

inc/google-reviews.php

@@ -20,7 +20,11 @@ function fritz_google_reviews(): array {
         return $fallback;
     }
 
-    $cacheFile = __DIR__ . '/../cache/google-reviews.json';
+    // In Docker, FITZ_CACHE_DIR points into the writable data/ mount, outside
+    // the web root, so deploys don't wipe it and www/ can stay read-only to
+    // www-data. Local dev falls back to cache/ in the project root.
+    $cacheDir = getenv('FITZ_CACHE_DIR') ?: __DIR__ . '/../cache';
+    $cacheFile = $cacheDir . '/google-reviews.json';
 
     if (is_file($cacheFile)) {
         $cached = json_decode((string) file_get_contents($cacheFile), true);
@@ -33,7 +37,6 @@ function fritz_google_reviews(): array {
     $fresh = fritz_fetch_google_reviews($fallback);
     $fresh['fetched_at'] = time();
 
-    $cacheDir = dirname($cacheFile);
     if (!is_dir($cacheDir)) {
         @mkdir($cacheDir, 0775, true);
     }