outposts/proxy: use disableIndex for static files

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

internal/utils/web/static.go

@@ -0,0 +1,17 @@
+package web
+
+import (
+	"net/http"
+	"strings"
+)
+
+func DisableIndex(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if strings.HasSuffix(r.URL.Path, "/") {
+			http.NotFound(w, r)
+			return
+		}
+
+		next.ServeHTTP(w, r)
+	})
+}