Rendering: Add support for renderer token (#54425) (#54431)

(cherry picked from commit a4f75cc0438712c90b02d24740416f8615e3a0cb)
(cherry picked from commit 6ec06f66b9)

Co-authored-by: Joan López de la Franca Beltran <5459617+joanlopez@users.noreply.github.com>

pkg/setting/setting.go

@@ -238,6 +238,7 @@ type Cfg struct {
 	CSVsDir                        string
 	RendererUrl                    string
 	RendererCallbackUrl            string
+	RendererAuthToken              string
 	RendererConcurrentRequestLimit int
 
 	// Security
@@ -1411,6 +1412,7 @@ func (cfg *Cfg) readRenderingSettings(iniFile *ini.File) error {
 	renderSec := iniFile.Section("rendering")
 	cfg.RendererUrl = valueAsString(renderSec, "server_url", "")
 	cfg.RendererCallbackUrl = valueAsString(renderSec, "callback_url", "")
+	cfg.RendererAuthToken = valueAsString(renderSec, "renderer_token", "-")
 
 	if cfg.RendererCallbackUrl == "" {
 		cfg.RendererCallbackUrl = AppUrl