CLDR-17481 add instructions to Test.html, run.sh not needed

tools/cldr-apps/js/package.json

@@ -5,6 +5,7 @@
   "main": "index.js",
   "scripts": {
     "build-test": "webpack --config webpack-test.config.js",
+    "watch-test": "npm run build-test -- --watch",
     "test": "npm run nonbrowser-test && npm run browser-test",
     "nonbrowser-test": "mocha --reporter spec test/nonbrowser/test-*.mjs",
     "browser-test": "npm run build-test && mocha-headless-chrome -f test/Test.html",

tools/cldr-apps/js/test/Test.html

@@ -16,17 +16,14 @@
       "
     >
       <h1>CLDR SurveyTool JavaScript Tests</h1>
-      <script>
-        if (location.protocol === "file:") {
-          document.write(
-            "<h1>Error</h1><p>The protocol should be <b>html:</b>, not <b>file:</b><br />A server is required; see <b>run.sh</b></p>"
-          );
-        }
-      </script>
-      <p>
-        <em>Important:</em> run with run.sh; open the browser console to check
+      <ul>
+        <li>in the 'js' directory, run <code>npm i</code> to install</li>
+        <li>To rebuild, run <code>npm run build-test</code></li>
+        <li>If you want to continuously compile, keep <code>npm run watch-test</code> (control-C to cancel)</li>
+        <li>open the browser console to check
         for errors/warnings that are otherwise invisible!
-      </p>
+        </li>
+      </ul>
       <p><em>References:</em></p>
       <ul>
         <li>