http_static: add .json content

Type: feature

Signed-off-by: Dave Barach <dave@barachs.net>
Change-Id: Ibf8583175c181dc12a589b3e6c11a10ee77fc160
diff --git a/extras/http/startup.cfg b/extras/http/startup.cfg
index a7b9dc3..b2a50d3 100644
--- a/extras/http/startup.cfg
+++ b/extras/http/startup.cfg
@@ -1,5 +1,7 @@
 unix {
      interactive
+     poll-sleep-usec 500
+     startup-config /scratch/vpp-http/extras/http/setup.http
 }
 
 tls {