Add build step to schema npm script

Author: camdecoster

devtools/test_dashboard/build.mjs

@@ -0,0 +1,7 @@
+import { build } from 'esbuild';
+import { localDevConfig } from '../../esbuild-config.js';
+
+// Build plotly.js to be used locally, such as when generating the schema.
+// This is the same process used in the test dashboard server script, but
+// run only once.
+build(localDevConfig);

package.json

@@ -28,7 +28,7 @@
     "bundle": "node tasks/bundle.mjs",
     "extra-bundles": "node tasks/extra_bundles.mjs",
     "locales": "node tasks/locales.js",
-    "schema": "node tasks/schema.mjs",
+    "schema": "node devtools/test_dashboard/build.mjs && node tasks/schema.mjs",
     "stats": "node tasks/stats.js",
     "find-strings": "node tasks/find_locale_strings.js",
     "preprocess": "node tasks/preprocess.js",