diff --git a/internal/services/appservice/linux_web_app_resource.go b/internal/services/appservice/linux_web_app_resource.go
index e32a12052faf..a0fcf20a42d0 100644
--- a/internal/services/appservice/linux_web_app_resource.go
+++ b/internal/services/appservice/linux_web_app_resource.go
@@ -402,6 +402,22 @@ func (r LinuxWebAppResource) Create() sdk.ResourceFunc {
 
 			metadata.SetID(id)
 
+			if siteConfigAppSetting := siteConfig.AppSettings; siteConfigAppSetting != nil && len(*siteConfigAppSetting) > 0 {
+				if webApp.AppSettings == nil {
+					webApp.AppSettings = make(map[string]string)
+				}
+				for _, pair := range *siteConfigAppSetting {
+					if pair.Name == nil || pair.Value == nil {
+						continue
+					}
+					if *pair.Name == "DOCKER_REGISTRY_SERVER_URL" ||
+						*pair.Name == "DOCKER_REGISTRY_SERVER_USERNAME" ||
+						*pair.Name == "DOCKER_REGISTRY_SERVER_PASSWORD" {
+						webApp.AppSettings[*pair.Name] = *pair.Value
+					}
+				}
+			}
+
 			appSettingsUpdate := helpers.ExpandAppSettingsForUpdate(webApp.AppSettings)
 			if metadata.ResourceData.HasChange("site_config.0.health_check_eviction_time_in_min") {
 				appSettingsUpdate.Properties["WEBSITE_HEALTHCHECK_MAXPINGFAILURES"] = pointer.To(strconv.Itoa(webApp.SiteConfig[0].HealthCheckEvictionTime))
diff --git a/internal/services/appservice/linux_web_app_slot_resource.go b/internal/services/appservice/linux_web_app_slot_resource.go
index 65337dbd9581..8a5775608d96 100644
--- a/internal/services/appservice/linux_web_app_slot_resource.go
+++ b/internal/services/appservice/linux_web_app_slot_resource.go
@@ -383,6 +383,21 @@ func (r LinuxWebAppSlotResource) Create() sdk.ResourceFunc {
 
 			metadata.SetID(id)
 
+			if siteConfigAppSetting := siteConfig.AppSettings; siteConfigAppSetting != nil && len(*siteConfigAppSetting) > 0 {
+				if webAppSlot.AppSettings == nil {
+					webAppSlot.AppSettings = make(map[string]string)
+				}
+				for _, pair := range *siteConfigAppSetting {
+					if pair.Name == nil || pair.Value == nil {
+						continue
+					}
+					if *pair.Name == "DOCKER_REGISTRY_SERVER_URL" ||
+						*pair.Name == "DOCKER_REGISTRY_SERVER_USERNAME" ||
+						*pair.Name == "DOCKER_REGISTRY_SERVER_PASSWORD" {
+						webAppSlot.AppSettings[*pair.Name] = *pair.Value
+					}
+				}
+			}
 			appSettings := helpers.ExpandAppSettingsForUpdate(webAppSlot.AppSettings)
 			if metadata.ResourceData.HasChange("site_config.0.health_check_eviction_time_in_min") {
 				appSettings.Properties["WEBSITE_HEALTHCHECK_MAXPINGFAILURES"] = pointer.To(strconv.Itoa(webAppSlot.SiteConfig[0].HealthCheckEvictionTime))