Fix nginx configuration.

Author: VillePihlava

nginx/nginx.conf

@@ -1,8 +1,10 @@
 server {
-    listen 8080;
-    location / {
-        root /usr/share/nginx/html;
-        index index.html index.htm;
-        try_files $uri $uri/ /index.html =404;
-    }
-}
+  listen 8080;
+  root /usr/share/nginx/html;
+  index index.html;
+
+  location /graphiql {
+    rewrite ^/graphiql(/.*) $1 break;
+    try_files $uri /index.html =404;
+  }
+}