Update README.md

dgeibi · May 2, 2018 · d8af567 · d8af567
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diff --git a/README.md b/README.md
@@ -1,35 +1,55 @@
 # DNS Proxy
-A simple DNS proxy written in go on top of [github.com/miekg/dns](https://github.com/miekg/dns)
+A simple DNS proxy written in go based on [github.com/miekg/dns](https://github.com/miekg/dns)
 
 ## How to use it
 
 
-# Docker
-```
-```
-# Download executables
+## Docker
+
+```shell
+$ docker run -p 153:53/udp katakonst/go-dns-proxy:latest -use-outbound -json-config='{
+    "defaultDns": "8.8.8.8:53",
+    "servers": {
+        "google.com" : "8.8.8.8:53"
+    },
+    "domains": {
+        "test.com." : "8.8.8.8"
+    }
+}'
 ```
+
+## Download executables
+
 [Download](https://github.com/katakonst/go-dns-proxy/releases)
-```
 
-# GO get
+## Go get
+
 ```shell
 $ go get github.com/katakonst/go-dns-proxy
+$ go-dns-proxy -use-outbound -json-config='{
+    "defaultDns": "8.8.8.8:53",
+    "servers": {
+        "google.com" : "8.8.8.8:53"
+    },
+    "domains": {
+        "test.com." : "8.8.8.8"
+    }
+}'
 ```
 
-
-## Arguments & Options
+## Arguments
 
 ```
 	-file		    config filename
-	-log-level		log level
+	-log-level		log level(info or error)
 	-expiration		cache expiration time in seconds
 	-use-outbound	use outbound address as host for server
+    -config-json    configs as json
 ```
 
 ## Config file format
 
-```
+```json
 {
     "host": "192.168.1.4:53",
     "defaultDns": "8.8.8.8:53",

diff --git a/circle.yml b/circle.yml
diff --git a/dns_proxy.go b/dns_proxy.go
@@ -58,7 +58,7 @@ func (proxy *DNSProxy) processOtherTypes(dnsServer string, q *dns.Question, requ
 	if len(msg.Answer) > 0 {
 		return &msg.Answer[0], nil
 	}
-	return nil, nil
+	return nil, fmt.Errorf("not found")
 }
 
 func (proxy *DNSProxy) processTypeA(dnsServer string, q *dns.Question, requestMsg *dns.Msg) (*dns.RR, error) {