view: Add /version endpoint

This allows to get the server version via HTTP. The output of `git
describe --dirty --always` and a line break is returned together with
HTTP 200.

If the server build contains no version information an error message and
HTTP 404 is returned.

1 files changed, 2 insertions, 0 deletions

diff --git a/main.go b/main.go
index 2c39239..50cfce5 100644
--- a/main.go
+++ b/main.go
@@ -59,6 +59,8 @@ func startServer(addr string) *http.Server {
 	r.PathPrefix("/static/").
 		Handler(http.StripPrefix("/static/", http.FileServer(http.FS(static))))
 
+	r.HandleFunc("/version", view.VersionRead(gitDescribe)).Methods(`GET`)
+
 	r.HandleFunc("/recipes", view.RecipesRead).Methods(`GET`)
 
 	r.HandleFunc("/recipe", controller.RecipeCreate).Methods(`POST`)