fix: fail app on empty app url before parsing

* New translations en.json (Romanian)

* New translations en.json (Spanish)

* New translations en.json (Afrikaans)

* New translations en.json (Norwegian)

* New translations en.json (Polish)

* New translations en.json (Portuguese)

* New translations en.json (Russian)

* New translations en.json (Serbian (Cyrillic))

* New translations en.json (Swedish)

* New translations en.json (Turkish)

* New translations en.json (Vietnamese)

* New translations en.json (Portuguese, Brazilian)

* New translations en.json (Korean)

* New translations en.json (Arabic)

* New translations en.json (Catalan)

* New translations en.json (Czech)

* New translations en.json (Danish)

* New translations en.json (German)

* New translations en.json (Finnish)

* New translations en.json (Hebrew)

* New translations en.json (Italian)

* New translations en.json (Japanese)

* New translations en.json (Dutch)

* New translations en.json (Chinese Traditional)

internal/bootstrap/app_bootstrap.go

@@ -47,6 +47,10 @@ func (app *BootstrapApp) Setup() error {
 	fmt.Println("Tinyauth is moving to an organization! All versions after v5.0.7 will be released under ghcr.io/tinyauthapp/tinyauth. Existing images will continue to work but new features and updates (including security ones) will only be released under the new image path.")
 
 	// get app url
+	if app.config.AppURL == "" {
+		return fmt.Errorf("app URL cannot be empty, perhaps config loading failed")
+	}
+
 	appUrl, err := url.Parse(app.config.AppURL)
 
 	if err != nil {