[FEATURE] make abovethefold task optional and allow BrowserSync to serve

from filesystem

core/tasks/css.js

@@ -274,6 +274,10 @@ module.exports = class Css extends Task {
 	 */
 	async _abovethefold() {
 		return new Promise(async resolve => {
+			if (this._config.cssPipeline.abovethefold === false) {
+				resolve();
+				return;
+			}
 			const filename = path.basename(this._config.abovethefold.template);
 			try {
 				let html = await inlineSource(this._config.abovethefold.template, {

core/tasks/server.js

@@ -9,13 +9,14 @@ module.exports = class Server extends Task {
 
 	/**
 	 * Start the server
-	 * 
+	 *
 	 * @override
 	 */
 	async run(_subTask = null) {
 		return new Promise(resolve => {
 			browserSync({
-				proxy: this.getUrl(),
+				proxy: this._config.browsersync.url ? this.getUrl() : undefined,
+				server: this._config.browsersync.server ? this._config.browsersync.server : undefined,
 				middleware: (req, res, next) => {
 					var conjunction;
 					if (req.url.match(/\?/)) {
@@ -37,7 +38,7 @@ module.exports = class Server extends Task {
 	getUrl() {
 		const configuredUrl = this._config.browsersync.url;
 		let desiredDomain = argv.d;
-	
+
 		if (typeof configuredUrl === 'string') {
 			return configuredUrl;
 		} else if (typeof configuredUrl === 'object') {