dtimm: host a friendly greeting

This change adds a `dtimm` binary that hosts a nice message on port
:8080

Change-Id: Ia770d7adf93aa649c6bee378937b6e826b1862a5
Reviewed-on: https://go-review.googlesource.com/132257
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/dtimm/main.go b/dtimm/main.go
new file mode 100644
index 0000000..7dffa2e
--- /dev/null
+++ b/dtimm/main.go
@@ -0,0 +1,20 @@
+// Copyright 2018 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.
+
+// dtimm command hosts a friendly message on port :8080.
+package main
+
+import (
+	"io"
+	"log"
+	"net/http"
+)
+
+func main() {
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		io.WriteString(w, "Hello from GopherCon 2018!")
+	})
+
+	log.Fatal(http.ListenAndServe(":8080", nil))
+}