Update dockerfile and server for app dir

Dockerfile

@@ -8,7 +8,8 @@ RUN echo "deb http://archive.ubuntu.com/ubuntu precise main universe" > /etc/apt
 RUN apt-get update
 RUN apt-get upgrade
 
-ADD . /dockerui
+ADD . /app/
+ADD dockerui dockerui
 
 EXPOSE 9000:9000
 

dockerui.go

@@ -6,7 +6,6 @@ import (
 	"github.com/elazarl/goproxy"
 	"log"
 	"net/http"
-	"os"
 	"strings"
 )
 
@@ -66,12 +65,7 @@ func main() {
 
 	path := fmt.Sprintf(":%s", *port)
 
-	cwd, err := os.Getwd()
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	handler := createHandler(cwd)
+	handler := createHandler("/app")
 
 	log.Fatal(http.ListenAndServe(path, handler))
 }