cli: do not apply react-hot-loader transforms for backend development

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

.changeset/quick-avocados-sell.md

@@ -0,0 +1,5 @@
+---
+'@backstage/cli': patch
+---
+
+Fixed a bug were the `react-hot-loader` transform was being applied to backend development builds.

packages/cli/src/lib/bundler/config.ts

@@ -226,7 +226,7 @@ export async function createBackendConfig(
   // See frontend config
   const externalPkgs = packages.filter(p => !isChildPath(paths.root, p.dir));
 
-  const { loaders } = transforms(options);
+  const { loaders } = transforms({ ...options, isBackend: true });
 
   const runScriptNodeArgs = new Array<string>();
   if (options.inspectEnabled) {

packages/cli/src/lib/bundler/transforms.ts

@@ -25,12 +25,13 @@ type Transforms = {
 
 type TransformOptions = {
   isDev: boolean;
+  isBackend?: boolean;
 };
 
 export const transforms = (options: TransformOptions): Transforms => {
-  const { isDev } = options;
+  const { isDev, isBackend } = options;
 
-  const extraTransforms = isDev ? ['react-hot-loader'] : [];
+  const extraTransforms = isDev && !isBackend ? ['react-hot-loader'] : [];
 
   // This ensures that styles inserted from the style-loader and any
   // async style chunks are always given lower priority than JSS styles.