This can be removed after upgrading to Node >= 19 as keepAlive is defaulted to
true after 19.

Index: code-server/lib/vscode/src/vs/platform/request/node/proxy.ts
===================================================================
--- code-server.orig/lib/vscode/src/vs/platform/request/node/proxy.ts
+++ code-server/lib/vscode/src/vs/platform/request/node/proxy.ts
@@ -42,6 +42,7 @@ export async function getProxyAgent(rawR
 		port: (proxyEndpoint.port ? +proxyEndpoint.port : 0) || (proxyEndpoint.protocol === 'https' ? 443 : 80),
 		auth: proxyEndpoint.auth,
 		rejectUnauthorized: isBoolean(options.strictSSL) ? options.strictSSL : true,
+		keepAlive: true,
 	};
 
 	if (requestURL.protocol === 'http:') {
