Add api package serving our api routes using gorilla/mux

api/api.go

@@ -0,0 +1,17 @@
+package api
+
+import "github.com/gorilla/mux"
+
+// NewRouter returns an HTTP handler (net.Handler) which can then
+// be used by the net/http package to serve the api of our API.
+// We use gorilla/mux because it is more convenient than net/http,
+// e.g. when extracting path parameters.
+func NewRouter() *mux.Router {
+	router := mux.NewRouter()
+	// this can later be restricted to a specific host with
+	// `router.Host(...)` and to HTTPS with `router.Schemes("https")`
+	v1 := router.PathPrefix("/api/v1").Subrouter()
+	v1.HandleFunc("/health", Health).Methods("GET")
+
+	return v1
+}