dl: add go1.19beta1

Change-Id: I20c214c03da7f54e22b50fac982459f8b1244ccb
Reviewed-on: https://go-review.googlesource.com/c/dl/+/411416
Reviewed-by: Heschi Kreinick <heschi@google.com>
Run-TryBot: Gopher Robot <gobot@golang.org>
Reviewed-by: Alex Rakoczy <alex@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Gopher Robot <gobot@golang.org>
diff --git a/go1.19beta1/main.go b/go1.19beta1/main.go
new file mode 100644
index 0000000..e6991f6
--- /dev/null
+++ b/go1.19beta1/main.go
@@ -0,0 +1,24 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// The go1.19beta1 command runs the go command from Go 1.19beta1.
+//
+// To install, run:
+//
+//	$ go install golang.org/dl/go1.19beta1@latest
+//	$ go1.19beta1 download
+//
+// And then use the go1.19beta1 command as if it were your normal go
+// command.
+//
+// See the release notes at https://tip.golang.org/doc/go1.19.
+//
+// File bugs at https://go.dev/issue/new.
+package main
+
+import "golang.org/dl/internal/version"
+
+func main() {
+	version.Run("go1.19beta1")
+}