adding rollbar plugin & backend

This is the first commit of the rollbar plugin. It is fully functional
but will require some additional features to make it more usable and
feature complete. It currently includes a backend wraps the rollbar REST
API and provides data for the frontend plugin.

packages/app/package.json

@@ -13,6 +13,7 @@
     "@backstage/plugin-graphiql": "^0.1.1-alpha.13",
     "@backstage/plugin-lighthouse": "^0.1.1-alpha.13",
     "@backstage/plugin-register-component": "^0.1.1-alpha.13",
+    "@backstage/plugin-rollbar": "^0.1.1-alpha.13",
     "@backstage/plugin-scaffolder": "^0.1.1-alpha.13",
     "@backstage/plugin-sentry": "^0.1.1-alpha.13",
     "@backstage/plugin-tech-radar": "^0.1.1-alpha.13",

packages/app/src/apis.ts

@@ -57,6 +57,8 @@ import {
 } from '@backstage/plugin-graphiql';
 import { scaffolderApiRef, ScaffolderApi } from '@backstage/plugin-scaffolder';
 
+import { rollbarApiRef, RollbarClient } from '@backstage/plugin-rollbar';
+
 export const apis = (config: ConfigApi) => {
   // eslint-disable-next-line no-console
   console.log(`Creating APIs for ${config.getString('app.title')}`);
@@ -170,5 +172,13 @@ export const apis = (config: ConfigApi) => {
     ]),
   );
 
+  builder.add(
+    rollbarApiRef,
+    new RollbarClient({
+      apiOrigin: backendUrl,
+      basePath: '/rollbar',
+    }),
+  );
+
   return builder.build();
 };

packages/app/src/plugins.ts

@@ -26,3 +26,4 @@ export { plugin as GitopsProfiles } from '@backstage/plugin-gitops-profiles';
 export { plugin as TechDocs } from '@backstage/plugin-techdocs';
 export { plugin as GraphiQL } from '@backstage/plugin-graphiql';
 export { plugin as GithubActions } from '@backstage/plugin-github-actions';
+export { plugin as Rollbar } from '@backstage/plugin-rollbar';