update readme

@@ -15,47 +15,48 @@ gostash -f etc/config.yaml
 config.yaml示例如下:
 
 ```yaml
-Input:
-  Kafka:
-    Name: gostash
-    Brokers:
-      - 172.16.186.16:19092
-      - 172.16.186.17:19092
-    Topic: k8slog
-    Group: pro
-    NumProducers: 16
-Filters:
-  - Action: drop
-    Conditions:
-      - Key: k8s_container_name
-        Value: "-rpc"
-        Type: contains
-      - Key: level
-        Value: info
-        Type: match
-        Op: and
-  - Action: remove_field
-    Fields:
-      - message
-      - _source
-      - _type
-      - _score
-      - _id
-      - "@version"
-      - topic
-      - index
-      - beat
-      - docker_container
-      - offset
-      - prospector
-      - source
-      - stream
-Output:
-  ElasticSearch:
-    Hosts:
-      - 172.16.141.4:9200
-      - 172.16.141.5:9200
-    DailyIndexPrefix: k8s_pro-
+Processors:
+- Input:
+    Kafka:
+      Name: gostash
+      Brokers:
+        - "172.16.186.16:19092"
+        - "172.16.186.17:19092"
+      Topic: k8slog
+      Group: pro
+      NumProducers: 16
+  Filters:
+    - Action: drop
+      Conditions:
+        - Key: k8s_container_name
+          Value: "-rpc"
+          Type: contains
+        - Key: level
+          Value: info
+          Type: match
+          Op: and
+    - Action: remove_field
+      Fields:
+        - message
+        - _source
+        - _type
+        - _score
+        - _id
+        - "@version"
+        - topic
+        - index
+        - beat
+        - docker_container
+        - offset
+        - prospector
+        - source
+        - stream
+  Output:
+    ElasticSearch:
+      Hosts:
+        - "172.16.141.4:9200"
+        - "172.16.141.5:9200"
+      DailyIndexPrefix: k8s_pro-
 ```
 
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@@ -18,7 +18,7 @@ import (
 
 const dateFormat = "2006.01.02"
 
-var configFile = flag.String("f", "etc/config.json", "Specify the config file")
+var configFile = flag.String("f", "etc/config.yaml", "Specify the config file")
 
 func main() {
 	flag.Parse()