feat/fix: implement WebSockets for NowPlaying, better data fetching with addl. Last.fm fetch, docker build fix

lib/socket.ts

@@ -0,0 +1,28 @@
+"use client"
+
+import { io, Socket } from "socket.io-client"
+
+let socket: Socket | null = null
+
+export const getSocket = (): Socket => {
+  if (!socket) {
+    socket = io(undefined, {
+      autoConnect: false,
+    })
+  }
+  return socket
+}
+
+export const connectSocket = (): Socket => {
+  const s = getSocket()
+  if (!s.connected) {
+    s.connect()
+  }
+  return s
+}
+
+export const disconnectSocket = (): void => {
+  if (socket?.connected) {
+    socket.disconnect()
+  }
+}