add fromConfig to stack overflow api

Signed-off-by: Brian Fletcher <brian@roadie.io>

plugins/stack-overflow/src/api/StackOverflowClient.ts

@@ -21,6 +21,7 @@ import {
   StackOverflowQuestion,
   StackOverflowQuestionsRequestParams,
 } from '../types';
+import { Config } from '@backstage/config';
 
 export class StackOverflowClient implements StackOverflowApi {
   private baseUrl: string;
@@ -29,6 +30,14 @@ export class StackOverflowClient implements StackOverflowApi {
     this.baseUrl = baseUrl;
   }
 
+  static fromConfig(config: Config) {
+    return new StackOverflowClient({
+      baseUrl:
+        config.getOptionalString('stackoverflow.baseUrl') ||
+        'https://api.stackexchange.com/2.2',
+    });
+  }
+
   /**
    * List Questions in the StackOverflow instance
    *

plugins/stack-overflow/src/plugin.ts

@@ -35,12 +35,7 @@ export const stackOverflowPlugin = createPlugin({
     createApiFactory({
       api: stackOverflowApiRef,
       deps: { configApi: configApiRef },
-      factory: ({ configApi }) =>
-        new StackOverflowClient({
-          baseUrl:
-            configApi.getOptionalString('stackoverflow.baseUrl') ||
-            'https://api.stackexchange.com/2.2',
-        }),
+      factory: ({ configApi }) => StackOverflowClient.fromConfig(configApi),
     }),
   ],
 });