Update webpack stack

server/helpers/core-utils.ts

@@ -0,0 +1,22 @@
+/*
+  Different from 'utils' because we don't not import other PeerTube modules.
+  Useful to avoid circular dependencies.
+*/
+
+import { join } from 'path'
+
+function isTestInstance () {
+  return process.env.NODE_ENV === 'test'
+}
+
+function root () {
+  // We are in /dist/helpers/utils.js
+  return join(__dirname, '..', '..', '..')
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  isTestInstance,
+  root
+}