Add complete playout service, chat backend, frontend with HLS player and live chat, Docker integration with health checks, updated CHANGELOG and architecture docs

frontend/src/counter.ts

@@ -0,0 +1,9 @@
+export function setupCounter(element: HTMLButtonElement) {
+  let counter = 0
+  const setCounter = (count: number) => {
+    counter = count
+    element.innerHTML = `Count is ${counter}`
+  }
+  element.addEventListener('click', () => setCounter(counter + 1))
+  setCounter(0)
+}