update npm scripts

bin/bundler.mjs

@@ -42,7 +42,9 @@ for (const input of inputs) {
     const { root, prefix, src, dst } = input;
 
     if (src && dst) {
-        if (virtMap.has(dst)) {
+        if (!fs.existsSync(src)) {
+            console.log({ src_missing: src });
+        } else if (virtMap.has(dst)) {
             console.log('pre-existing', dst);
         } else {
             entries.push({ file: src, virt: dst });

bin/esbuild.config.mjs

@@ -66,7 +66,7 @@ const rec = {
     logOverride,
     minify: isProd,      // false for dev, true for prod
     platform: 'browser',
-    sourcemap: !isProd,  // true for dev, false for prod
+    sourcemap: false,
     target: 'es2020',
 };