MIME: added application/json MIME type.

Signed-off-by: Piotr Sikora <piotr@cloudflare.com>
diff --git a/conf/mime.types b/conf/mime.types
index 6e3e8e0..f63a77a 100644
--- a/conf/mime.types
+++ b/conf/mime.types
@@ -26,6 +26,7 @@
 
     application/font-woff                 woff;
     application/java-archive              jar war ear;
+    application/json                      json;
     application/mac-binhex40              hqx;
     application/msword                    doc;
     application/pdf                       pdf;