Fix 405 on thumbnail uploads: move MinIO proxy above static asset regex

Nginx regex locations are evaluated in order — the static asset caching
rule (.jpg, .png, etc.) was matching image upload URLs before the MinIO
bucket proxy could handle them, causing PUT requests to return 405.

Moved the /indeedhub-*/ proxy location to the top of the regex block.

Co-authored-by: Cursor <cursoragent@cursor.com>

docker-compose.yml

@@ -20,7 +20,7 @@ services:
       context: .
       dockerfile: Dockerfile
       args:
-        CACHEBUST: "9"
+        CACHEBUST: "10"
         VITE_USE_MOCK_DATA: "false"
         VITE_CONTENT_ORIGIN: ${FRONTEND_URL}
         VITE_INDEEHUB_API_URL: /api