Add Jenkins widgets

packages/app/src/apis.ts

@@ -62,6 +62,8 @@ import {
   GithubActionsClient,
   githubActionsApiRef,
 } from '@backstage/plugin-github-actions';
+import {jenkinsApiRef, JenkinsApi} from "@backstage/plugin-jenkins";
+
 
 import { TravisCIApi, travisCIApiRef } from '@roadiehq/backstage-plugin-travis-ci';
 
@@ -85,6 +87,11 @@ export const apis = (config: ConfigApi) => {
     new CircleCIApi(`${backendUrl}/proxy/circleci/api`),
   );
 
+  builder.add(
+    jenkinsApiRef,
+    new JenkinsApi(`${backendUrl}/proxy/jenkins/api`),
+  );
+
   builder.add(githubActionsApiRef, new GithubActionsClient());
 
   builder.add(featureFlagsApiRef, new FeatureFlags());