Add default file.

README.md

@@ -568,5 +568,5 @@ go get -d github.com/sipt/shuttle
 cd $GOPATH/src/github.com/sipt/shuttle/assets
 go generate # package html and GeoLite2-Country.mmdb resources into assets/assets.go
 cd $GOPATH/src/github.com/sipt/shuttle/cmd
-go build
+go build -tags release
 ```

README_zh.md

@@ -594,5 +594,5 @@ go get -d github.com/sipt/shuttle
 cd $GOPATH/src/github.com/sipt/shuttle/assets
 go generate # 打包HTML和GeoLite2-Country.mmdb到assets/assets.go文件
 cd $GOPATH/src/github.com/sipt/shuttle/cmd
-go build
+go build -tags release
 ```

assets/assets_generate.go

@@ -1,3 +1,20 @@
+// +build !release
 //go:generate go run github.com/UnnoTed/fileb0x b0x.yaml
 
 package assets
+
+import (
+	"io/ioutil"
+	"net/http"
+)
+
+var HTTP http.FileSystem = http.Dir("./")
+
+// ReadFile is adapTed from ioutil
+func ReadFile(path string) ([]byte, error) {
+	f, err := HTTP.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	return ioutil.ReadAll(f)
+}

assets/b0x.yaml

@@ -13,7 +13,7 @@ dest: "."
 fmt: true
 
 # build tags for the main b0x.go file
-tags: ""
+tags: "release"
 
 # updater allows you to update a b0x in a running server
 # without having to restart it