fix: prefix images with base url for non-root quartz

layouts/_default/_markup/render-image.html

@@ -4,5 +4,5 @@
 <img src="{{ $src }}" alt="{{ .Text }}" {{ with .Title }} title="{{ . }}" {{ end }} />
 {{- else -}}
 {{$fixedUrl := (cond (hasPrefix $src "/") $src (print "/" $src)) | urlize}}
-<img src="{{ $fixedUrl }}" alt="{{ .Text }}" {{ with .Title }} title="{{ . }}" {{ end }} />
+<img src="{{.Page.Site.BaseURL}}{{ $fixedUrl }}" alt="{{ .Text }}" {{ with .Title }} title="{{ . }}" {{ end }} />
 {{- end -}}