fix the broken symbol link for chrome bin

fix go-rod#445

lib/docker/Dockerfile

@@ -13,13 +13,12 @@ WORKDIR /rod
 RUN go env -w GO111MODULE=on && go env -w GOPROXY=$goproxy
 RUN go build ./lib/launcher/rod-manager
 RUN go run ./lib/utils/get-browser
+RUN ln -s $(go run ./lib/utils/get-browser) /usr/bin/chrome
 
 FROM ubuntu:bionic
 
 ARG apt_sources="http://archive.ubuntu.com"
 
-RUN ln -s /root/.cache/rod/chromium-869685/chrome-linux/chrome /usr/bin/chrome
-
 RUN sed -i "s|http://archive.ubuntu.com|$apt_sources|g" /etc/apt/sources.list && \
     apt-get update && \
     apt-get install --no-install-recommends -y \
@@ -46,6 +45,7 @@ RUN sed -i "s|http://archive.ubuntu.com|$apt_sources|g" /etc/apt/sources.list &&
 ENTRYPOINT ["dumb-init", "--"]
 
 COPY --from=go /root/.cache/rod /root/.cache/rod
+COPY --from=go /usr/bin/chrome /usr/bin/
 COPY --from=go /rod/rod-manager /usr/bin/
 
 CMD rod-manager

lib/utils/get-browser/main.go

@@ -1,10 +1,15 @@
 package main
 
 import (
+	"fmt"
+
 	"github.com/go-rod/rod/lib/launcher"
 	"github.com/go-rod/rod/lib/utils"
 )
 
 func main() {
-	utils.E(launcher.NewBrowser().Get())
+	p, err := launcher.NewBrowser().Get()
+	utils.E(err)
+
+	fmt.Println(p)
 }