Add missing example config, update readme.

Author: tomaz-s1

README.md

@@ -111,7 +111,7 @@ For example, let's say your custom config fragment lives in ``ci/examples/agent.
 1. Obtain base64 encoded version of the JSON file content
 
 ```bash
-cat ci/examples/agent.d/my-config.json| sed -e 's/^ *//' | tr -d '\n' | base64
+cat ci/examples/agent.d/my-config.json | sed -e 's/^ *//' | tr -d '\n' | base64
 ```
 
 To avoid any YAML formatting issues, we also utilize ``sed`` and ``tr`` command to fold multi line

ci/examples/agent.d/my-config.json

@@ -0,0 +1,4 @@
+{
+    "max_log_offset_size": 5242880,
+    "debug_level": 5
+}