diff --git a/.gitignore b/.gitignore
index 3d0a5c7..6eb44a1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,5 +14,6 @@
 **/*/files/
 **/*/uploadings/
 
-# misc
-dist
\ No newline at end of file
+# build
+dist
+tmp
\ No newline at end of file
diff --git a/cmd/quickshare b/cmd/quickshare
deleted file mode 100755
index 92494e0..0000000
Binary files a/cmd/quickshare and /dev/null differ
diff --git a/cmd/main.go b/cmd/start/main.go
similarity index 74%
rename from cmd/main.go
rename to cmd/start/main.go
index ea3e9e2..4e73c2d 100644
--- a/cmd/main.go
+++ b/cmd/start/main.go
@@ -1,6 +1,9 @@
 package main
 
 import (
+	"fmt"
+	"strings"
+
 	"github.com/ihexxa/gocfg"
 	goflags "github.com/jessevdk/go-flags"
 
@@ -30,7 +33,14 @@ func main() {
 	}
 	if len(opts.Configs) > 0 {
 		for _, configPath := range opts.Configs {
-			cfg, err = cfg.Load(gocfg.JSON(configPath))
+			if strings.HasSuffix(configPath, ".yml") || strings.HasSuffix(configPath, ".yaml") {
+				cfg, err = cfg.Load(gocfg.YAML(configPath))
+			} else if strings.HasSuffix(configPath, ".json") {
+				cfg, err = cfg.Load(gocfg.JSON(configPath))
+			} else {
+				panic(fmt.Sprintf("unknown config file type (.yml .yaml .json are supported): %s", configPath))
+			}
+
 			if err != nil {
 				panic(err)
 			}
diff --git a/configs/dev.yml b/configs/dev.yml
new file mode 100644
index 0000000..7a30ba8
--- /dev/null
+++ b/configs/dev.yml
@@ -0,0 +1,21 @@
+fs:
+  root: "tmp"
+  opensLimit: 128
+  openTTL: 60 # 1 min
+secrets:
+  tokenSecret: ""
+server:
+  debug: true
+  host: "0.0.0.0"
+  port: 8686
+  readTimeout: 2000
+  writerTimeout: 86400000 # 1 day
+  maxHeaderBytes: 512
+  publicPath: "public"
+users:
+  enableAuth: true
+  defaultAdmin: ""
+  defaultAdminPwd: ""
+  cookieTTL: 604800 # 1 week
+  cookieSecure: false
+  cookieHttpOnly: true
diff --git a/go.mod b/go.mod
index 31978a8..6504b11 100644
--- a/go.mod
+++ b/go.mod
@@ -10,6 +10,7 @@ require (
 	github.com/ihexxa/gocfg v0.0.0-20201206115732-ab537e3b1086
 	github.com/ihexxa/multipart v0.0.0-20201207132919-72f6e0e58b25
 	github.com/jessevdk/go-flags v1.4.0
+	github.com/mitchellh/gox v1.0.1 // indirect
 	github.com/parnurzeal/gorequest v0.2.16
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/robbert229/jwt v2.0.0+incompatible
diff --git a/go.sum b/go.sum
index 131bb81..2bfd23f 100644
--- a/go.sum
+++ b/go.sum
@@ -31,6 +31,8 @@ github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaW
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1 h1:EGx4pi6eqNxGaHF6qqu48+N2wcFQ5qg5FXgOdqsJ5d8=
 github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
+github.com/hashicorp/go-version v1.0.0 h1:21MVWPKDphxa7ineQQTrCU5brh7OuVVAzGOCnnCPtE8=
+github.com/hashicorp/go-version v1.0.0/go.mod h1:fltr4n8CU8Ke44wwGCBoEymUuxUHl09ZGVZPK5anwXA=
 github.com/ihexxa/gocfg v0.0.0-20201206115732-ab537e3b1086 h1:1IzU4pzD8NyEHgJGLOS3Iq56b0zlAylRwbJq+08PD9Y=
 github.com/ihexxa/gocfg v0.0.0-20201206115732-ab537e3b1086/go.mod h1:oqDTq1ywx4Qi9DdhFwwMHoPCYv6Txrfj2SY5WWcgiJs=
 github.com/ihexxa/multipart v0.0.0-20201201114901-e265a43930c0 h1:L2fR7u66Kgh0DYOZWJPxOj23JrwEgUqOOivZHp6qfG8=
@@ -50,6 +52,10 @@ github.com/leodido/go-urn v1.2.0/go.mod h1:+8+nEpDfqqsY+g338gtMEUOtuK+4dEMhiQEgx
 github.com/mattn/go-isatty v0.0.9/go.mod h1:YNRxwqDuOph6SZLI9vUUz6OYw3QyUt7WiY2yME+cCiQ=
 github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
 github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
+github.com/mitchellh/gox v1.0.1 h1:x0jD3dcHk9a9xPSDN6YEL4xL6Qz0dvNYm8yZqui5chI=
+github.com/mitchellh/gox v1.0.1/go.mod h1:ED6BioOGXMswlXa2zxfh/xdd5QhwYliBFn9V18Ap4z4=
+github.com/mitchellh/iochan v1.0.0 h1:C+X3KsSTLFVBr/tK1eYN/vs4rJcvsiLU338UhYPJWeY=
+github.com/mitchellh/iochan v1.0.0/go.mod h1:JwYml1nuB7xOzsp52dPpHFffvOCDupsG0QubkSMEySY=
 github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 h1:ZqeYNhU3OHLH3mGKHDcjJRFFRrJa6eAM5H+CtDdOsPc=
 github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742 h1:Esafd1046DLDQ0W1YjYsBW+p8U2u7vzgW2SQVmlNazg=
diff --git a/package.json b/package.json
index 91d25fd..2488b97 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,7 @@
     "src/client/web"
   ],
   "scripts": {
-    "build": "scripts/build"
+    "build": "scripts/build",
+    "start": "go run cmd/start/main.go -c `pwd`/configs/dev.yml"
   }
 }
diff --git a/scripts/build b/scripts/build
index 3c65f95..a0903f4 100755
--- a/scripts/build
+++ b/scripts/build
@@ -1,8 +1,30 @@
 export QSROOT=`pwd`
 rm -r dist && mkdir dist
-cd cmd
-go build -o $QSROOT/dist/quickshare
+
+go get github.com/mitchellh/gox
+cd cmd/start
+gox \
+    -osarch="windows/386 windows/amd64 darwin/amd64 linux/386 linux/amd64 linux/arm linux/arm64" \
+    -output "$QSROOT/dist/quickshare_{{.OS}}_{{.Arch}}/quickshare"
+
 cd $QSROOT/src/client/web
 yarn build
-cp -r $QSROOT/public $QSROOT/dist
+
 cd $QSROOT
+cp -R $QSROOT/public $QSROOT/dist/quickshare_windows_386
+cp -R $QSROOT/public $QSROOT/dist/quickshare_windows_amd64
+cp -R $QSROOT/public $QSROOT/dist/quickshare_darwin_amd64
+cp -R $QSROOT/public $QSROOT/dist/quickshare_linux_386
+cp -R $QSROOT/public $QSROOT/dist/quickshare_linux_amd64
+cp -R $QSROOT/public $QSROOT/dist/quickshare_linux_arm
+cp -R $QSROOT/public $QSROOT/dist/quickshare_linux_arm64
+
+cd $QSROOT/dist
+
+zip -r -q $QSROOT/dist/quickshare_windows_386.zip quickshare_windows_386/*
+zip -r -q $QSROOT/dist/quickshare_windows_amd64.zip quickshare_windows_amd64/*
+zip -r -q $QSROOT/dist/quickshare_darwin_amd64.zip quickshare_darwin_amd64/*
+zip -r -q $QSROOT/dist/quickshare_linux_386.zip quickshare_linux_386/*
+zip -r -q $QSROOT/dist/quickshare_linux_amd64.zip quickshare_linux_amd64/*
+zip -r -q $QSROOT/dist/quickshare_linux_arm.zip quickshare_linux_arm/*
+zip -r -q $QSROOT/dist/quickshare_linux_arm64.zip quickshare_linux_arm64/*
diff --git a/src/client/web/src/common/env.ts b/src/client/web/src/common/env.ts
index 6a95c48..984a275 100644
--- a/src/client/web/src/common/env.ts
+++ b/src/client/web/src/common/env.ts
@@ -5,3 +5,7 @@ export function alertMsg(msg: string) {
     console.log(msg);
   }
 }
+
+export function comfirmMsg(msg: string): boolean {
+  return confirm(msg);
+}
diff --git a/src/client/web/src/components/browser.tsx b/src/client/web/src/components/browser.tsx
index 15c0092..825a876 100644
--- a/src/client/web/src/components/browser.tsx
+++ b/src/client/web/src/components/browser.tsx
@@ -4,7 +4,7 @@ import { List, Map } from "immutable";
 import FileSize from "filesize";
 
 import { Layouter } from "./layouter";
-import { alertMsg } from "../common/env";
+import { alertMsg, comfirmMsg } from "../common/env";
 import { updater } from "./browser.updater";
 import { ICoreState } from "./core_state";
 import {
@@ -139,6 +139,11 @@ export class Browser extends React.Component<Props, State, {}> {
         selectedItems: Map<string, boolean>(),
       });
       return;
+    } else {
+      const filesToDel = this.state.selectedItems.keySeq().join(", ");
+      if (!comfirmMsg(`do you want to delete ${filesToDel}?`)) {
+        return;
+      }
     }
 
     updater()
diff --git a/src/client/web/src/components/core_state.ts b/src/client/web/src/components/core_state.ts
index 7be585e..c7470c2 100644
--- a/src/client/web/src/components/core_state.ts
+++ b/src/client/web/src/components/core_state.ts
@@ -32,7 +32,6 @@ export function initWithWorker(worker: IWorker): ICoreState {
 }
 
 export function init(): ICoreState {
-  const scripts = Array.from(document.querySelectorAll("script"));
   const worker = Worker == null ? new FgWorker() : new BgWorker();
   initUploadMgr(worker);
 
diff --git a/src/client/web/src/worker/__test__/upload.worker.test.ts b/src/client/web/src/worker/__test__/upload.worker.test.ts
index 045c6a0..157da2e 100644
--- a/src/client/web/src/worker/__test__/upload.worker.test.ts
+++ b/src/client/web/src/worker/__test__/upload.worker.test.ts
@@ -62,6 +62,12 @@ describe("upload.worker", () => {
         expectedUploaderStartInput: "file1",
         currentFilePath: "file0",
       },
+      {
+        infos: [makeEntry("file1", true)],
+        expectedUploadingFile: "file1",
+        expectedUploaderStartInput: "file1",
+        currentFilePath: "file1",
+      },
     ];
 
     for (let i = 0; i < tcs.length; i++) {
diff --git a/src/client/web/src/worker/upload.baseworker.ts b/src/client/web/src/worker/upload.baseworker.ts
index 43460ed..50968d6 100644
--- a/src/client/web/src/worker/upload.baseworker.ts
+++ b/src/client/web/src/worker/upload.baseworker.ts
@@ -57,10 +57,10 @@ export class UploadWorker {
             infoArray[i].runnable &&
             infoArray[i].uploaded < infoArray[i].size
           ) {
-            if (infoArray[i].filePath !== this.filePath) {
-              this.stopUploader();
-              this.startUploader(infoArray[i].file, infoArray[i].filePath);
-            }
+            // infoArray[i].filePath !== this.filePath, it may re-uploading a deleted file
+            // and it will stuck or the file will be renamed in the future
+            this.stopUploader();
+            this.startUploader(infoArray[i].file, infoArray[i].filePath);
             break;
           } else if (
             !infoArray[i].runnable &&
diff --git a/src/client/web/src/worker/upload_mgr.ts b/src/client/web/src/worker/upload_mgr.ts
index 3e4c6ac..03bd474 100644
--- a/src/client/web/src/worker/upload_mgr.ts
+++ b/src/client/web/src/worker/upload_mgr.ts
@@ -144,7 +144,7 @@ export class UploadMgr {
   };
 }
 
-export let uploadMgr = new UploadMgr(new FgWorker());
+export let uploadMgr: UploadMgr = undefined;
 export const initUploadMgr = (worker: IWorker): UploadMgr => {
   uploadMgr = new UploadMgr(worker);
   return uploadMgr;
diff --git a/src/server/config.go b/src/server/config.go
index 74a48b8..49ef828 100644
--- a/src/server/config.go
+++ b/src/server/config.go
@@ -28,6 +28,7 @@ type ServerCfg struct {
 	ReadTimeout    int    `json:"readTimeout"`
 	WriteTimeout   int    `json:"writeTimeout"`
 	MaxHeaderBytes int    `json:"maxHeaderBytes"`
+	PublicPath     string `json:"publicPath"`
 }
 
 type Config struct {
@@ -66,6 +67,7 @@ func DefaultConfig() (string, error) {
 			ReadTimeout:    2000,
 			WriteTimeout:   1000 * 3600 * 24, // 1 day
 			MaxHeaderBytes: 512,
+			PublicPath:     "public",
 		},
 	}
 
diff --git a/src/server/server.go b/src/server/server.go
index 93383f3..b56b69c 100644
--- a/src/server/server.go
+++ b/src/server/server.go
@@ -4,8 +4,10 @@ import (
 	"context"
 	"crypto/rand"
 	"crypto/sha1"
+	"errors"
 	"fmt"
 	"net/http"
+	"os"
 	"time"
 
 	"github.com/gin-contrib/static"
@@ -56,6 +58,22 @@ func NewServer(cfg gocfg.ICfg) (*Server, error) {
 	}, nil
 }
 
+func mkRoot(rootPath string) {
+	info, err := os.Stat(rootPath)
+	if err != nil {
+		if os.IsNotExist(err) {
+			err = os.MkdirAll(rootPath, 0760)
+			if err != nil {
+				panic(err)
+			}
+		} else {
+			panic(err)
+		}
+	} else if !info.IsDir() {
+		panic(fmt.Sprintf("can not create %s folder: there is a file with same name", rootPath))
+	}
+}
+
 func initDeps(cfg gocfg.ICfg) *depidx.Deps {
 	secret, ok := cfg.String("ENV.TOKENSECRET")
 	if !ok {
@@ -64,6 +82,7 @@ func initDeps(cfg gocfg.ICfg) *depidx.Deps {
 	}
 
 	rootPath := cfg.GrabString("Fs.Root")
+	mkRoot(rootPath)
 	opensLimit := cfg.GrabInt("Fs.OpensLimit")
 	openTTL := cfg.GrabInt("Fs.OpenTTL")
 
@@ -121,10 +140,15 @@ func initHandlers(router *gin.Engine, cfg gocfg.ICfg, deps *depidx.Deps) (*gin.E
 		return nil, err
 	}
 
+	publicPath, ok := cfg.String("Server.PublicPath")
+	if !ok || publicPath == "" {
+		return nil, errors.New("publicPath not found or empty")
+	}
+
 	// middleware
 	router.Use(userHdrs.Auth())
 	// tmp static server
-	router.Use(static.Serve("/", static.LocalFile("../public", false)))
+	router.Use(static.Serve("/", static.LocalFile(publicPath, false)))
 
 	// handler
 	v1 := router.Group("/v1")