make async and readonly

Signed-off-by: aramissennyeydd <aramis.sennyey@doordash.com>

plugins/gateway-backend/src/plugin.ts

@@ -38,11 +38,11 @@ export const gatewayPlugin = createBackendPlugin({
       async init({ logger, discovery, instanceMeta, rootHttpRouter }) {
         rootHttpRouter.use(
           '/api/:pluginId',
-          createRouter({
+          (await createRouter({
             discovery,
             instanceMeta,
             logger,
-          }) as Handler,
+          })) as Handler,
         );
       },
     });

plugins/gateway-backend/src/router.ts

@@ -23,7 +23,7 @@ import { createProxyMiddleware } from 'http-proxy-middleware';
 import { context } from '@opentelemetry/api';
 import { getRPCMetadata } from '@opentelemetry/core';
 
-export function createRouter({
+export async function createRouter({
   discovery,
   instanceMeta,
 }: {
@@ -31,9 +31,8 @@ export function createRouter({
   instanceMeta: InstanceMetadataService;
   logger: LoggerService;
 }) {
-  const localPluginIds = new Set(
-    instanceMeta.getInstalledPlugins().map(f => f.pluginId),
-  );
+  const plugins = await instanceMeta.getInstalledPlugins();
+  const localPluginIds = new Set(plugins.map(f => f.pluginId));
 
   const proxy = createProxyMiddleware({
     changeOrigin: true,