Updated conf

Signed-off-by: Marcus Noble <github@marcusnoble.co.uk>

default.conf

@@ -1,6 +1,5 @@
 server {
     listen       80;
-    listen  [::]:80;
     server_name  localhost;
 
     rewrite ^/dont-reuse-keys/?$ https://marcusnoble.co.uk/2020-10-03-t-i-l-don-t-reuse-api-keys/ permanent;
@@ -15,5 +14,15 @@ server {
     rewrite ^/yaml-key-spaces/?$ https://marcusnoble.co.uk/2021-05-11-t-i-l-yaml-keys-allow-for-spaces-in-them/ permanent;
     rewrite ^/yaml-multiline/?$ https://marcusnoble.co.uk/2020-09-17-t-i-l-yaml-multiline-values/ permanent;
     rewrite ^/?$ https://marcusnoble.co.uk/ permanent;
+
+    location / {
+        root   /usr/share/nginx/html;
+        index  index.html index.htm;
+    }
+
+    error_page   500 502 503 504  /50x.html;
+    location = /50x.html {
+        root   /usr/share/nginx/html;
+    }
 }