ajout gestion erreur nginx

nginx.conf

@@ -35,4 +35,10 @@ server {
     location / {
         try_files $uri $uri/ /index.html;
     }
+
+    error_page   500 502 503 504  /50x.html;
+    location = /50x.html {
+        root   /usr/share/nginx/html;
+    }
+
 }