change regex

appservice/src/createAppService/SiteNameStep.ts

@@ -113,7 +113,7 @@ export class SiteNameStep extends AzureNameStep<SiteNameStepWizardContext> {
 
         if (name.length < siteNamingRules.minLength || name.length > siteNamingRules.maxLength) {
             return vscode.l10n.t('The name must be between {0} and {1} characters.', siteNamingRules.minLength, siteNamingRules.maxLength);
-        } else if (this._siteFor === "containerizedFunctionApp" && (!/^[a-z]([-a-z0-9]*[a-z0-9])?$/.test(name))) {
+        } else if (this._siteFor === "containerizedFunctionApp" && (!/^[a-z][a-z0-9]*(-[a-z0-9]+)*$/.test(name))) {
             return vscode.l10n.t("A name must consist of lower case alphanumeric characters or '-', start with an alphabetic character, and end with an alphanumeric character and cannot have '--'.");
         } else if (siteNamingRules.invalidCharsRegExp.test(name)) {
             return vscode.l10n.t("The name can only contain letters, numbers, or hyphens.");