Added proxy test.

src/app.js

@@ -112,6 +112,16 @@ async function startMemorySample(snapshotTriggers = []) {
 	}, config.memorySampling.sampleDuration);
 }
 
+async function testProxy() {
+	if (config.proxy.enable && argv.testProxy) {
+		const res = await unprint.get(argv.testProxy);
+
+		if (!res.ok) {
+			throw new Error(`Proxy is offline (${res.status})`);
+		}
+	}
+}
+
 async function init() {
 	try {
 		await redis.connect();
@@ -186,6 +196,8 @@ async function init() {
 			console.log(res.status, res.body);
 		}
 
+		await testProxy();
+
 		const actorsFromFile = argv.actorsFile && await getFileEntries(argv.actorsFile);
 		const actorNames = (argv.actors || []).concat(actorsFromFile || []);