Update tasks - remove gulp (replaced by node scripts, working with mconfig) + esbuild (no more es5 support) + add critical css in config file

build/build.js

@@ -0,0 +1,9 @@
+import { buildScripts } from './scripts.js';
+import { concatVendors } from './concat.js';
+import { compileStyles } from './styles.js' ;
+import { generateSpriteSVG } from './svgs.js' ;
+
+buildScripts();
+concatVendors();
+compileStyles();
+generateSpriteSVG();