Modify proxy cache settings in nginx.conf.template

Updated proxy cache settings to include more error statuses and removed specific cache validity for 404, 500, 502, 503, and 504.

Author: Robbie1977

nginx.conf.template

@@ -29,13 +29,8 @@ http {
     proxy_cache_methods GET HEAD;
 
     proxy_cache_valid 200 5d;
-    proxy_cache_valid 404 30s;
-    proxy_cache_valid 500 30s;
-    proxy_cache_valid 502 30s;
-    proxy_cache_valid 503 30s;
-    proxy_cache_valid 504 30s;
 
-    proxy_cache_use_stale updating;
+    proxy_cache_use_stale error timeout updating http_500 http_502 http_503 http_504 http_404;
     proxy_cache_background_update on;
     proxy_cache_lock on;