Add a resource to handle config changes

site-cookbooks/ipfs/README.md

@@ -11,7 +11,9 @@ It currently only supports 64bit platforms
 
 ### Chef
 
-- Chef 12.0 or later
+- Chef 12.5 or later (we are providing a
+  [https://docs.chef.io/custom_resources.html](Custom Resource) to configure
+  IPFS
 
 ### Cookbook dependencies
 
@@ -41,6 +43,18 @@ site (64bit)
 connect to. This will stop platforms like Hetzner to block your server
 (https://github.com/ipfs/go-ipfs/issues/1226)
 
+## Resources
+
+`ipfs_config` sets the config. Supports hashes, arrays, booleans and strings.
+Does not change anything if the config already has that value, and restarts
+the server automatically
+
+```ruby
+ipfs_config "Gateway.Writable" do
+  true
+ end
+```
+
 ## License and Authors
 
 Authors: Kosmos