Add 'Try it out' instructions

README.md

@@ -23,6 +23,21 @@ change in GitLab / NGINX to make this work.
 - ..end POST to gitlab-git-http-server
 - end POST to NGINX
 
+## Try it out
+
+You can try out the Git server without authentication as follows:
+
+```
+# Start a fake auth backend that allows everything/everybody
+go run support/say-yes.go &
+# Start gitlab-git-http-server
+go run main.go /path/to/git-repos
+```
+
+Now if you have a Git repository in `/path/to/git-repos/my-repo.git`,
+you can push to and pull from it at the URL
+`http://localhost:8181/my-repo.git`.
+
 ## License
 
 This code is distributed under the MIT license, see the LICENSE file.

support/say-yes.go

+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+)
+
+func main() {
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		fmt.Fprint(w, "Yes")
+	})
+
+	log.Fatal(http.ListenAndServe("localhost:8080", nil))
+}