app-backend,cli: add support for injecting full config based on serialized schema

packages/backend/src/plugins/app.ts

@@ -17,9 +17,13 @@
 import { createRouter } from '@backstage/plugin-app-backend';
 import { PluginEnvironment } from '../types';
 
-export default async function createPlugin({ logger }: PluginEnvironment) {
+export default async function createPlugin({
+  logger,
+  config,
+}: PluginEnvironment) {
   return await createRouter({
     logger,
+    config,
     appPackageName: 'example-app',
   });
 }

packages/core/src/api-wrappers/createApp.tsx

@@ -61,7 +61,11 @@ export const defaultConfigLoader: AppConfigLoader = async (
   if (runtimeConfigJson !== '__app_injected_runtime_config__'.toUpperCase()) {
     try {
       const data = JSON.parse(runtimeConfigJson) as JsonObject;
-      configs.push({ data, context: 'env' });
+      if (Array.isArray(data)) {
+        configs.push(...data);
+      } else {
+        configs.push({ data, context: 'env' });
+      }
     } catch (error) {
       throw new Error(`Failed to load runtime configuration, ${error}`);
     }