v3: added opengraph support to the app, wrote README instructions incl. a Docker image

api/routes/ws.ts

@@ -1,4 +1,5 @@
 import { Router } from "@oak/oak";
+import { ALLOWED_ORIGINS } from "../config.ts";
 import { verifyJWT } from "../lib/jwt.ts";
 import {
   broadcastPresence,
@@ -24,8 +25,7 @@ import {
 const router = new Router();
 
 function isAllowedOrigin(origin: string): boolean {
-  if (!origin) return false;
-  return /^https?:\/\/(localhost|127\.0\.0\.1)(:\d+)?$/.test(origin);
+  return ALLOWED_ORIGINS.includes(origin);
 }
 
 router.get("/ws", async (ctx) => {
@@ -45,12 +45,9 @@ router.get("/ws", async (ctx) => {
 
   const socket = ctx.upgrade();
 
-  let avatarMime: string | undefined;
-  if (authPayload) {
-    try {
-      avatarMime = getUserById(authPayload.userId).avatarMime;
-    } catch { /* user not found */ }
-  }
+  const avatarMime = authPayload
+    ? getUserById(authPayload.userId).avatarMime
+    : undefined;
 
   const client: WsClient = {
     socket,