fix formatting of nginx default.conf

Author: benniekiss

docker/default.conf

@@ -1,10 +1,10 @@
 server {
-	listen 80 default_server;
-	listen [::]:80 default_server;
+   listen 80 default_server;
+   listen [::]:80 default_server;
 
-    root /usr/share/nginx/html;
+   root /usr/share/nginx/html;
 
-    location / {
+   location / {
       try_files $uri $uri.html $uri/ =404;
       add_header Cache-Control "no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0";
       expires off;