Fix loading service worker

packages/signed-api/src/signed-data-verifier-pool.ts

@@ -4,16 +4,22 @@ import workerpool, { type Pool } from 'workerpool';
 let pool: Pool | undefined;
 
 export const initializeVerifierPool = () => {
-  pool = workerpool.pool(`${__dirname}/signed-data-verifier.ts`, {
-    // Allow using the worker as a TypeScript module. See:
-    // https://github.com/josdejong/workerpool/issues/379#issuecomment-1580093502.
-    //
-    // Note, that the pool default settings are well set, so we are leaving that as is.
-    workerType: 'thread',
-    workerThreadOpts: {
-      execArgv: ['--require', 'ts-node/register'],
-    },
-  });
+  // Allow using the worker from TS (run in development mode) or JS files (when compiled). Note, that transpiling the
+  // file in development mode is done by ts-node and so it must be available.
+  const extension = __filename.endsWith('.ts') ? 'ts' : 'js';
+  // Allow using the worker as a TypeScript module. See:
+  // https://github.com/josdejong/workerpool/issues/379#issuecomment-1580093502.
+  //
+  // Note, that the pool default settings are well set, so we are leaving that as is.
+  const options =
+    extension === 'ts'
+      ? {
+          workerThreadOpts: {
+            execArgv: ['--require', 'ts-node/register'],
+          },
+        }
+      : {};
+  pool = workerpool.pool(`${__dirname}/signed-data-verifier.${extension}`, options);
 
   return pool;
 };