[client] Feature/upload bundle (#3734)

Add an upload bundle option with the flag --upload-bundle; by default, the upload will use a NetBird address, which can be replaced using the flag --upload-bundle-url.

The upload server is available under the /upload-server path. The release change will push a docker image to netbirdio/upload image repository.

The server supports using s3 with pre-signed URL for direct upload and local file for storing bundles.

upload-server/main.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"errors"
+	"log"
+	"net/http"
+
+	"github.com/netbirdio/netbird/upload-server/server"
+	"github.com/netbirdio/netbird/util"
+)
+
+func main() {
+	err := util.InitLog("info", "console")
+	if err != nil {
+		log.Fatalf("Failed to initialize logger: %v", err)
+	}
+
+	srv := server.NewServer()
+	if err = srv.Start(); err != nil && !errors.Is(err, http.ErrServerClosed) {
+		log.Fatalf("Failed to start server: %v", err)
+	}
+}