chore: sync port references and docs to 4000s infra

src/env.ts

@@ -137,7 +137,7 @@ export const config: AppConfig = {
   storageChatId: parseInt(process.env.STORAGE_CHANNEL_ID!, 10),
   baseUrl: process.env.BASE_URL!,
   databaseUrl: process.env.DATABASE_URL!,
-  port: parseInt(process.env.PORT!, 10) || 3000,
+  port: parseInt(process.env.PORT!, 10) || 4000,
   nodeEnv: process.env.NODE_ENV || 'development',
   logLevel: process.env.LOG_LEVEL || 'info',
   rateLimitWindowMs: parseNumber(process.env.RATE_LIMIT_WINDOW_MS, 60000),

src/interfaces/s3/virtual-host.ts

@@ -1,5 +1,5 @@
 const stripPort = (host: string): string => {
-  // Handle IPv6: [::1]:8080 -> [::1]
+  // Handle IPv6: [::1]:4321 -> [::1]
   if (host.startsWith('[')) {
     const closeBracket = host.indexOf(']');
     return host.slice(0, closeBracket + 1).toLowerCase();