disable open_file_cache for review thumbnails

Review thumbnails are rewritten in place while a review is active, and nginx's open_file_cache reused the stale file size for up to 2 minutes. A larger rewrite was served truncated with a 200, and a smaller one aborted the response mid-transfer, which broke notification images. The review thumbnail location now skips the cache.

docker/main/rootfs/usr/local/nginx/conf/nginx.conf

@@ -176,6 +176,12 @@ http {
             add_header Cache-Control "public";
             autoindex on;
             root /media/frigate;
+
+            # review thumbnails are rewritten in place while a review is active,
+            # so a cached file size truncates the response
+            location /clips/review/ {
+                open_file_cache off;
+            }
         }
 
         location /cache/ {