Merge pull request #560 from Azure/swa-start-perf-boost

fix(start): keep connection open with http-proxy

Author: sulabh-msft

src/msha/server.ts

@@ -15,7 +15,13 @@ import { handleUserConfig, onConnectionLost, requestMiddleware } from "./middlew
 
 const { SWA_CLI_PORT } = swaCLIEnv();
 
-const proxyApp = httpProxy.createProxyServer({ autoRewrite: true });
+const proxyApp = httpProxy.createProxyServer({
+  autoRewrite: true,
+  agent: new http.Agent({
+    keepAlive: true,
+    keepAliveMsecs: 5000,
+  }),
+});
 
 if (!isHttpUrl(SWA_CLI_API_URI())) {
   logger.error(`The provided API URI ${SWA_CLI_API_URI} is not a valid. Exiting.`, true);