backend-app-api: flip logic of health service

Signed-off-by: Vincenzo Scamporlino <vincenzos@spotify.com>

packages/backend-plugin-api/api-report.md

@@ -335,7 +335,18 @@ export type ExtensionPoint<T> = {
 export type ExtensionPointConfig = CreateExtensionPointOptions;
 
 // @public (undocumented)
-export interface HealthService {}
+export interface HealthService {
+  // (undocumented)
+  getLiveness(): Promise<{
+    status: number;
+    payload?: any;
+  }>;
+  // (undocumented)
+  getReadiness(): Promise<{
+    status: number;
+    payload?: any;
+  }>;
+}
 
 // @public
 export interface HttpAuthService {

packages/backend-plugin-api/src/services/definitions/HealthService.ts

@@ -17,4 +17,7 @@
 /**
  * @public
  */
-export interface HealthService {}
+export interface HealthService {
+  getLiveness(): Promise<{ status: number; payload?: any }>;
+  getReadiness(): Promise<{ status: number; payload?: any }>;
+}