fixes

cmd/server/runner.go

@@ -30,6 +30,14 @@ func run(updateChan <-chan struct{}) {
 		slog.SetLogLoggerLevel(slog.LevelDebug)
 	}
 
+	if !filepath.IsAbs(documentRoot) {
+		if v, err := filepath.Abs(documentRoot); err == nil {
+			documentRoot = v
+		} else {
+			fatal("failed to get absolute path from document-root flag: "+err.Error(), 2)
+		}
+	}
+
 	slog.Info("loading .htpasswd")
 	h, err := htpasswd.Open(filepath.Join(documentRoot, ".htpasswd"))
 	if err != nil {