Add cache logs

nginx.conf

@@ -12,7 +12,9 @@ http {
     proxy_cache_path /etc/nginx/data/cache levels=1:2 keys_zone=api_cache:10m max_size=100g inactive=365d;
 
     error_log /dev/stdout warn;
-    access_log /dev/stdout;
+
+    log_format main '$remote_addr - $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent" cache:$upstream_cache_status';
+    access_log /dev/stdout main;
 
     resolver 127.0.0.11 valid=60s;