Fix backend-plugin-api alpha api report

Signed-off-by: Philipp Hugenroth <philipph@spotify.com>

packages/backend-app-api/alpha-api-report.md

@@ -0,0 +1,16 @@
+## API Report File for "@backstage/backend-app-api"
+
+> Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
+
+```ts
+import { FeatureDiscoveryService } from '@backstage/backend-plugin-api/alpha';
+import { ServiceFactory } from '@backstage/backend-plugin-api';
+
+// @alpha (undocumented)
+export const featureDiscoveryServiceFactory: () => ServiceFactory<
+  FeatureDiscoveryService,
+  'root'
+>;
+
+// (No @packageDocumentation comment for this package)
+```

packages/backend-app-api/package.json

@@ -12,13 +12,13 @@
   },
   "exports": {
     ".": "./src/index.ts",
-    "./alpha": "./src/alpha/index.ts",
+    "./alpha": "./src/alpha.ts",
     "./package.json": "./package.json"
   },
   "typesVersions": {
     "*": {
       "alpha": [
-        "src/alpha/index.ts"
+        "src/alpha.ts"
       ],
       "package.json": [
         "package.json"

packages/backend-app-api/src/alpha.ts

@@ -14,4 +14,4 @@
  * limitations under the License.
  */
 
-export { featureDiscoveryServiceFactory } from './featureDiscoveryServiceFactory';
+export { featureDiscoveryServiceFactory } from './alpha/featureDiscoveryServiceFactory';