upd help

README.md

@@ -12,15 +12,19 @@ USAGE:
    esctl [global options] [command [command options]]
 
 VERSION:
-   v0.0.1
+   v0.0.3
 
 COMMANDS:
-   health     show ES health
    search, /       search within an index
+   index, i        manage indicies
+   snapshot, snap  manage snapshots
+   cluster, c      manage cluster[s]
    help, h         Shows a list of commands or help for one command
 
 GLOBAL OPTIONS:
    --debug, -d                  enable debugging [$ES_DEBUG]
+   --config string, -c string   config file [$ES_CONFIG]
+   --cluster string, -C string  cluster alias to work with
    --help, -h                   show help
    --version, -v                print the version
 ```
@@ -31,6 +35,23 @@ Configure `esctl` with environment variables:
 - `ES_USER`: username
 - `ES_PASS`: password
 
+Or create a config file such as this:
+
+```yaml
+clusters:
+  default:
+    uri: https://es.foo.bar:9200/
+    user: elastic
+    pass: 123456
+  other:
+    uri: https://myes.foo:9200/
+    user: elastic
+    pass: asdasdasd
+```
+
+If you want to  work on a specific cluster, specify  its name with the
+global `-C` option.
+
 ## Introduction
 
 FIXME