[local-preview] show DOMAIN in the output

This PR updates the `local-preview` to printout
the Domain of the Gitpod Instance for users to
access.

Signed-off-by: Tarun Pothulapati <tarun@gitpod.io>

install/preview/entrypoint.sh

@@ -30,6 +30,7 @@ fi
 if [ -z "${DOMAIN}" ]; then
   DOMAIN="127-0-0-1.nip.io"
 fi
+export DOMAIN
 
 echo "Gitpod Domain: $DOMAIN"
 

install/preview/prettylog/main.go

@@ -6,28 +6,36 @@ package main
 import (
 	"bufio"
 	"errors"
+	"fmt"
 	"io"
 	"os"
 	"strings"
 
 	"github.com/pterm/pterm"
 )
 
-var msgs = []struct {
-	Fail    string
-	Success string
+var (
+	Domain = "127-0-0-1.nip.io"
+	msgs   = []struct {
+		Fail    string
+		Success string
 
-	Msg string
-}{
-	{Msg: "checking prerequisites", Fail: "requires a system with at least", Success: "Gitpod Domain:"},
-	{Msg: "preparing system", Success: "extracting images to download ahead"},
-	{Msg: "downloading images", Success: "--output-split-files"},
-	{Msg: "preparing Gitpod preview installation", Success: "rm -rf /var/lib/rancher/k3s/server/manifests/gitpod"},
-	{Msg: "starting Gitpod", Success: "gitpod-telemetry-init"},
-	{Msg: "Gitpod is running"},
-}
+		Msg string
+	}{
+		{Msg: "checking prerequisites", Fail: "requires a system with at least", Success: "Gitpod Domain:"},
+		{Msg: "preparing system", Success: "extracting images to download ahead"},
+		{Msg: "downloading images", Success: "--output-split-files"},
+		{Msg: "preparing Gitpod preview installation", Success: "rm -rf /var/lib/rancher/k3s/server/manifests/gitpod"},
+		{Msg: "starting Gitpod", Success: "gitpod-telemetry-init"},
+		{Msg: fmt.Sprintf("Gitpod is running. Visit https://%s to access the dashboard", Domain)},
+	}
+)
 
 func main() {
+	if domain := os.Getenv("DOMAIN"); domain != "" {
+		Domain = domain
+	}
+
 	dmp, err := os.OpenFile("logs.txt", os.O_WRONLY|os.O_TRUNC|os.O_CREATE, 0644)
 	if err != nil {
 		panic(err)