Fix the ipfs config

The whole thing was inconsistent and didn't work when creating a server
from scratch

site-cookbooks/kosmos-ipfs/recipes/default.rb

@@ -7,6 +7,7 @@
 # All rights reserved - Do Not Redistribute
 #
 
+require 'json'
 include_recipe "ipfs"
 
 # Configure ipfs
@@ -18,18 +19,18 @@ end
 
 # Set up the Gateway to be writable
 ipfs_config "Gateway.Writable" do
-  value "true"
+  value true
 end
 
 # Set up CORS headers
 ipfs_config "API.HTTPHeaders.Access-Control-Allow-Credentials" do
-  value '["true"]'
+  value ["true"]
 end
 ipfs_config "API.HTTPHeaders.Access-Control-Allow-Methods" do
-  value '["PUT","GET","POST"]'
+  value ["PUT", "GET", "POST"]
 end
 ipfs_config "API.HTTPHeaders.Access-Control-Allow-Origin" do
-  value '["*"]'
+  value ["*"]
 end
 
 include_recipe "kosmos-ipfs::letsencrypt"