update readme

README.md

@@ -1,2 +1,26 @@
 # kibanaRefreshFields
 Refresh kibana index fields via kibanas API
+## Expected variables
+I have this setup in my ~/.bashrc, another deployment would be to place this in k8s.
+```/bin/bash
+export KIBANA_USERNAME=jmainguy
+export KIBANA_PASSWORD="supersecret"
+export KIBANA_URL=logs-lab.example.com
+export KIBANA_INDEX="filebeat-*"
+# Optional, if you want to filter out some fields
+export KIBANA_FILTER="kubernetes.labels.jenkins"
+```
+
+## Usage
+```/bin/bash
+./kibanaRefreshFields
+```
+
+## PreBuilt Binaries
+Grab Binaries from [The Releases Page](https://github.com/Jmainguy/kibanaRefreshFields/releases)
+
+## Build
+```/bin/bash
+export GO111MODULE=on
+go build
+```