docs: update docs

README.md

@@ -44,6 +44,17 @@ http_proxy=http://your-domain-or-ip-address:3142 apt-get -o pkgProblemResolver=t
 
 When we need to execute the above commands repeatedly in batches, the speed of update and installation **will be greatly improved**.
 
+### Specified Mirror
+
+```bash
+# proxy cache for both `ubuntu` and `debian`
+./apt-proxy --ubuntu=https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ --debian=https://mirrors.tuna.tsinghua.edu.cn/debian/
+# proxy cache for `ubuntu` only
+./apt-proxy --mode=ubuntu --ubuntu=https://mirrors.tuna.tsinghua.edu.cn/ubuntu/
+# proxy cache for `debian` only
+./apt-proxy --mode=debian --debian=https://mirrors.tuna.tsinghua.edu.cn/debian/
+```
+
 ### Speed UP Docker Container
 
 Assuming you have started a container:
@@ -80,16 +91,18 @@ View configuration items:
 Usage of apt-proxy:
   -cachedir string
     	the dir to store cache data in (default "./.aptcache")
+  -debian string
+    	the debian mirror for fetching packages
   -debug
     	whether to output debugging logging
   -host string
     	the host to bind to (default "0.0.0.0")
-  -mirror string
-    	the mirror for fetching packages
   -mode all
     	select the mode of system to cache: all / `ubuntu` / `debian` (default "all")
   -port string
     	the port to bind to (default "3142")
+  -ubuntu string
+    	the ubuntu mirror for fetching packages
 ```
 
 ## [WIP] Development

cli/daemon.go

@@ -30,7 +30,6 @@ func initStore(appFlags AppFlags) (cache httpcache.Cache, err error) {
 }
 
 func initProxy(appFlags AppFlags, cache httpcache.Cache) (ap *proxy.AptProxy) {
-	// TODO support both ubuntu and debian
 	ap = proxy.CreateAptProxyRouter()
 	ap.Handler = httpcache.NewHandler(cache, ap.Handler)
 	return ap

proxy/proxy.go

@@ -1,7 +1,6 @@
 package proxy
 
 import (
-	"fmt"
 	"log"
 	"net/http"
 	"net/http/httputil"
@@ -25,10 +24,7 @@ type AptProxy struct {
 }
 
 func CreateAptProxyRouter() *AptProxy {
-
 	mode := state.GetProxyMode()
-	fmt.Println("mode", mode)
-	// TODO support both ubuntu and debian
 	rewriter = linux.CreateNewRewriters(mode)
 
 	return &AptProxy{