WEB-653 feat(login): add tenant-specific logo support for dark mode (#3074)

improve

src/assets/env.js

@@ -21,6 +21,7 @@
   window["env"]["fineractPlatformTenantIds"]  = '';
 
   window['env']['tenantLogoUrl'] = '';
+  window['env']['tenantLogoUrlDark'] = '';
 
   // Language Environment variables
   window["env"]["defaultLanguage"] = '';

src/assets/env.template.js

@@ -25,6 +25,7 @@
   window['env']['fineractPlatformTenantIds'] = '$FINERACT_PLATFORM_TENANTS_IDENTIFIER';
 
   window['env']['tenantLogoUrl'] = '$TENANT_LOGO_URL';
+  window['env']['tenantLogoUrlDark'] = '$TENANT_LOGO_URL_DARK';
 
   // Language Environment variables
   window['env']['defaultLanguage'] = '$MIFOS_DEFAULT_LANGUAGE';