Docs: public README, setup guide and architecture, generic deploy files, and the T3 Code notice

gateway/test/notify.test.ts

@@ -94,7 +94,7 @@ describe("Notifier", () => {
     const row = {
       id: "host-1",
       label: "Mac mini",
-      url: "https://t3mac.gbrown.org",
+      url: "https://t3-mac.example.com",
       alt_urls: null,
       environment_id: "host-1",
       token: "t",